diff --git a/package-lock.json b/package-lock.json
index f70ee39..fce2bb5 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -24,6 +24,28 @@
         "js-tokens": "^4.0.0"
       }
     },
+    "@types/bson": {
+      "version": "4.0.5",
+      "resolved": "https://registry.npmjs.org/@types/bson/-/bson-4.0.5.tgz",
+      "integrity": "sha512-vVLwMUqhYJSQ/WKcE60eFqcyuWse5fGH+NMAXHuKrUAPoryq3ATxk5o4bgYNtg5aOM4APVg7Hnb3ASqUYG0PKg==",
+      "requires": {
+        "@types/node": "*"
+      }
+    },
+    "@types/mongodb": {
+      "version": "3.6.20",
+      "resolved": "https://registry.npmjs.org/@types/mongodb/-/mongodb-3.6.20.tgz",
+      "integrity": "sha512-WcdpPJCakFzcWWD9juKoZbRtQxKIMYF/JIAM4JrNHrMcnJL6/a2NWjXxW7fo9hxboxxkg+icff8d7+WIEvKgYQ==",
+      "requires": {
+        "@types/bson": "*",
+        "@types/node": "*"
+      }
+    },
+    "@types/node": {
+      "version": "18.11.18",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-18.11.18.tgz",
+      "integrity": "sha512-DHQpWGjyQKSHj3ebjFI/wRKcqQcdR+MoFBygntYOZytCqNfkd2ZC4ARDJ2DQqhjH5p85Nnd3jhUJIXrszFX/JA=="
+    },
     "abi-decoder": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/abi-decoder/-/abi-decoder-1.2.0.tgz",
@@ -190,14 +212,6 @@
       "integrity": "sha512-+Ryf6g3BKoRc7jfp7ad8tM4TtMiaWvbF/1/sQcZPkkS7ag3D5nMBCe2UfOTONtAkaG0tO0ij3C5Lwmf1EiyjHg==",
       "dev": true
     },
-    "async": {
-      "version": "2.6.0",
-      "resolved": "https://registry.npmjs.org/async/-/async-2.6.0.tgz",
-      "integrity": "sha512-xAfGg1/NTLBBKlHFmnd7PlmUW9KhVQIUuSrYem9xzFUZy13ScvtyGGejaae9iAVRiRq9+Cx7DPFaAAhCpyxyPw==",
-      "requires": {
-        "lodash": "^4.14.0"
-      }
-    },
     "async-limiter": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/async-limiter/-/async-limiter-1.0.0.tgz",
@@ -332,15 +346,24 @@
       "resolved": "https://registry.npmjs.org/bignumber.js/-/bignumber.js-5.0.0.tgz",
       "integrity": "sha512-KWTu6ZMVk9sxlDJQh2YH1UOnfDP8O8TpxUxgQG/vKASoSnEjK9aVuOueFaPcQEYQ5fyNXNTOYwYw3099RYebWg=="
     },
+    "bl": {
+      "version": "2.2.1",
+      "resolved": "https://registry.npmjs.org/bl/-/bl-2.2.1.tgz",
+      "integrity": "sha512-6Pesp1w0DEX1N550i/uGV/TqucVL4AM/pgThFSN/Qq9si1/DF9aIHs1BxD8V/QU0HoeHO6cQRTAuYnLPKq1e4g==",
+      "requires": {
+        "readable-stream": "^2.3.5",
+        "safe-buffer": "^5.1.1"
+      }
+    },
     "blob": {
       "version": "0.0.5",
       "resolved": "https://registry.npmjs.org/blob/-/blob-0.0.5.tgz",
       "integrity": "sha512-gaqbzQPqOoamawKg0LGVd7SzLgXS+JH61oWprSLH+P+abTczqJbhTR8CmJ2u9/bUYNmHTGJx/UEmn6doAvvuig=="
     },
     "bluebird": {
-      "version": "3.5.0",
-      "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.5.0.tgz",
-      "integrity": "sha1-eRQg1/VR7qKJdFOop3ZT+WYG1nw="
+      "version": "3.5.1",
+      "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.5.1.tgz",
+      "integrity": "sha512-MKiLiV+I1AA596t9w1sQJ8jkiSr5+ZKi0WKrYGUn6d1Fx+Ij4tIj+m2WMQSGczs5jZVxV339chE8iwk6F64wjA=="
     },
     "bn.js": {
       "version": "4.11.8",
@@ -409,14 +432,9 @@
       "dev": true
     },
     "bson": {
-      "version": "1.0.9",
-      "resolved": "https://registry.npmjs.org/bson/-/bson-1.0.9.tgz",
-      "integrity": "sha512-IQX9/h7WdMBIW/q/++tGd+emQr0XMdeZ6icnT/74Xk9fnabWn+gZgpE+9V+gujL3hhJOoNrnDVY7tWdzc7NUTg=="
-    },
-    "buffer-shims": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/buffer-shims/-/buffer-shims-1.0.0.tgz",
-      "integrity": "sha1-mXjOMXOIxkmth5MCjDR37wRKi1E="
+      "version": "1.1.6",
+      "resolved": "https://registry.npmjs.org/bson/-/bson-1.1.6.tgz",
+      "integrity": "sha512-EvVNVeGo4tHxwi8L6bPj3y3itEvStdwvvlojVxxbyYfoaxJ6keLgrTuKdyfEAszFK+H3olzBuafE0yoh0D1gdg=="
     },
     "bytes": {
       "version": "3.0.0",
@@ -802,6 +820,11 @@
       "integrity": "sha1-3zrhmayt+31ECqrgsp4icrJOxhk=",
       "dev": true
     },
+    "denque": {
+      "version": "1.5.1",
+      "resolved": "https://registry.npmjs.org/denque/-/denque-1.5.1.tgz",
+      "integrity": "sha512-XwE+iZ4D6ZUB7mfYRMb5wByE8L74HCn30FBN7sWnXksWc1LO1bPDl67pBR9o/kC4z/xSNAwkMYcGgqDV3BE3Hw=="
+    },
     "depd": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/depd/-/depd-1.1.2.tgz",
@@ -969,11 +992,6 @@
         "is-symbol": "^1.0.2"
       }
     },
-    "es6-promise": {
-      "version": "3.2.1",
-      "resolved": "https://registry.npmjs.org/es6-promise/-/es6-promise-3.2.1.tgz",
-      "integrity": "sha1-7FYjOGgDKQkgcXDDlEjiREndH8Q="
-    },
     "escape-html": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/escape-html/-/escape-html-1.0.3.tgz",
@@ -1813,11 +1831,6 @@
         "parse-passwd": "^1.0.0"
       }
     },
-    "hooks-fixed": {
-      "version": "2.0.2",
-      "resolved": "https://registry.npmjs.org/hooks-fixed/-/hooks-fixed-2.0.2.tgz",
-      "integrity": "sha512-YurCM4gQSetcrhwEtpQHhQ4M7Zo7poNGqY4kQGeBS6eZtOcT3tnNs01ThFa0jYBByAiYt1MjMjP/YApG0EnAvQ=="
-    },
     "hosted-git-info": {
       "version": "2.7.1",
       "resolved": "https://registry.npmjs.org/hosted-git-info/-/hosted-git-info-2.7.1.tgz",
@@ -2256,9 +2269,9 @@
       }
     },
     "kareem": {
-      "version": "1.5.0",
-      "resolved": "https://registry.npmjs.org/kareem/-/kareem-1.5.0.tgz",
-      "integrity": "sha1-4+QQHZ3P3imXadr0tNtk2JXRdEg="
+      "version": "2.3.2",
+      "resolved": "https://registry.npmjs.org/kareem/-/kareem-2.3.2.tgz",
+      "integrity": "sha512-STHz9P7X2L4Kwn72fA4rGyqyXdmrMSdxqHx9IXon/FXluXieaFA6KJ2upcHAHxQPQ0LeM/OjLrhFxifHewOALQ=="
     },
     "kind-of": {
       "version": "6.0.2",
@@ -2337,11 +2350,6 @@
       "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.11.tgz",
       "integrity": "sha512-cQKh8igo5QUhZ7lg38DYWAxMvjSAKG0A8wGSVimP07SIUEK2UO+arSRKbRZWtelMtN5V0Hkwh5ryOto/SshYIg=="
     },
-    "lodash.get": {
-      "version": "4.4.2",
-      "resolved": "https://registry.npmjs.org/lodash.get/-/lodash.get-4.4.2.tgz",
-      "integrity": "sha1-LRd/ZS+jHpObRDjVNBSZ36OCXpk="
-    },
     "log-symbols": {
       "version": "2.2.0",
       "resolved": "https://registry.npmjs.org/log-symbols/-/log-symbols-2.2.0.tgz",
@@ -2391,6 +2399,12 @@
         "p-is-promise": "^2.0.0"
       }
     },
+    "memory-pager": {
+      "version": "1.5.0",
+      "resolved": "https://registry.npmjs.org/memory-pager/-/memory-pager-1.5.0.tgz",
+      "integrity": "sha512-ZS4Bp4r/Zoeq6+NLJpP+0Zzm0pR8whtGPf1XExKLJBAczGMnSi3It14OiNCStjQjM6NU1okjQGSxgEZN8eBYKg==",
+      "optional": true
+    },
     "memorystream": {
       "version": "0.3.1",
       "resolved": "https://registry.npmjs.org/memorystream/-/memorystream-0.3.1.tgz",
@@ -2553,44 +2567,66 @@
       }
     },
     "mongodb": {
-      "version": "2.2.34",
-      "resolved": "https://registry.npmjs.org/mongodb/-/mongodb-2.2.34.tgz",
-      "integrity": "sha1-o09Zu+thdUrsQy3nLD/iFSakTBo=",
-      "requires": {
-        "es6-promise": "3.2.1",
-        "mongodb-core": "2.1.18",
-        "readable-stream": "2.2.7"
-      }
-    },
-    "mongodb-core": {
-      "version": "2.1.18",
-      "resolved": "https://registry.npmjs.org/mongodb-core/-/mongodb-core-2.1.18.tgz",
-      "integrity": "sha1-TEYTm986HwMt7ZHbSfOO7AFlkFA=",
-      "requires": {
-        "bson": "~1.0.4",
-        "require_optional": "~1.0.0"
+      "version": "3.7.3",
+      "resolved": "https://registry.npmjs.org/mongodb/-/mongodb-3.7.3.tgz",
+      "integrity": "sha512-Psm+g3/wHXhjBEktkxXsFMZvd3nemI0r3IPsE0bU+4//PnvNWKkzhZcEsbPcYiWqe8XqXJJEg4Tgtr7Raw67Yw==",
+      "requires": {
+        "bl": "^2.2.1",
+        "bson": "^1.1.4",
+        "denque": "^1.4.1",
+        "optional-require": "^1.1.8",
+        "safe-buffer": "^5.1.2",
+        "saslprep": "^1.0.0"
+      },
+      "dependencies": {
+        "optional-require": {
+          "version": "1.1.8",
+          "resolved": "https://registry.npmjs.org/optional-require/-/optional-require-1.1.8.tgz",
+          "integrity": "sha512-jq83qaUb0wNg9Krv1c5OQ+58EK+vHde6aBPzLvPPqJm89UQWsvSuFy9X/OSNJnFeSOKo7btE0n8Nl2+nE+z5nA==",
+          "requires": {
+            "require-at": "^1.0.6"
+          }
+        }
       }
     },
     "mongoose": {
-      "version": "4.13.18",
-      "resolved": "https://registry.npmjs.org/mongoose/-/mongoose-4.13.18.tgz",
-      "integrity": "sha512-pPZlVID+/9xl0pyBibr7CZbjYKzpJZuw58TdWwIxr3ydO/OUZqhX1kUEAQIzsOJVSsL6GnD1fb54reO35jvLtw==",
-      "requires": {
-        "async": "2.6.0",
-        "bson": "~1.0.4",
-        "hooks-fixed": "2.0.2",
-        "kareem": "1.5.0",
-        "lodash.get": "4.4.2",
-        "mongodb": "2.2.34",
-        "mpath": "0.5.1",
-        "mpromise": "0.5.5",
-        "mquery": "2.3.3",
-        "ms": "2.0.0",
-        "muri": "1.3.0",
-        "regexp-clone": "0.0.1",
+      "version": "5.13.15",
+      "resolved": "https://registry.npmjs.org/mongoose/-/mongoose-5.13.15.tgz",
+      "integrity": "sha512-cxp1Gbb8yUWkaEbajdhspSaKzAvsIvOtRlYD87GN/P2QEUhpd6bIvebi36T6M0tIVAMauNaK9SPA055N3PwF8Q==",
+      "requires": {
+        "@types/bson": "1.x || 4.0.x",
+        "@types/mongodb": "^3.5.27",
+        "bson": "^1.1.4",
+        "kareem": "2.3.2",
+        "mongodb": "3.7.3",
+        "mongoose-legacy-pluralize": "1.0.2",
+        "mpath": "0.8.4",
+        "mquery": "3.2.5",
+        "ms": "2.1.2",
+        "optional-require": "1.0.x",
+        "regexp-clone": "1.0.0",
+        "safe-buffer": "5.2.1",
+        "sift": "13.5.2",
         "sliced": "1.0.1"
+      },
+      "dependencies": {
+        "ms": {
+          "version": "2.1.2",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
+          "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w=="
+        },
+        "safe-buffer": {
+          "version": "5.2.1",
+          "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
+          "integrity": "sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ=="
+        }
       }
     },
+    "mongoose-legacy-pluralize": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/mongoose-legacy-pluralize/-/mongoose-legacy-pluralize-1.0.2.tgz",
+      "integrity": "sha512-Yo/7qQU4/EyIS8YDFSeenIvXxZN+ld7YdV9LqFVQJzTLye8unujAWPZ4NWKfFA+RNjh+wvTWKY9Z3E5XM6ZZiQ=="
+    },
     "morgan": {
       "version": "1.9.1",
       "resolved": "https://registry.npmjs.org/morgan/-/morgan-1.9.1.tgz",
@@ -2604,30 +2640,29 @@
       }
     },
     "mpath": {
-      "version": "0.5.1",
-      "resolved": "https://registry.npmjs.org/mpath/-/mpath-0.5.1.tgz",
-      "integrity": "sha512-H8OVQ+QEz82sch4wbODFOz+3YQ61FYz/z3eJ5pIdbMEaUzDqA268Wd+Vt4Paw9TJfvDgVKaayC0gBzMIw2jhsg=="
-    },
-    "mpromise": {
-      "version": "0.5.5",
-      "resolved": "https://registry.npmjs.org/mpromise/-/mpromise-0.5.5.tgz",
-      "integrity": "sha1-9bJCWddjrMIlewoMjG2Gb9UXMuY="
+      "version": "0.8.4",
+      "resolved": "https://registry.npmjs.org/mpath/-/mpath-0.8.4.tgz",
+      "integrity": "sha512-DTxNZomBcTWlrMW76jy1wvV37X/cNNxPW1y2Jzd4DZkAaC5ZGsm8bfGfNOthcDuRJujXLqiuS6o3Tpy0JEoh7g=="
     },
     "mquery": {
-      "version": "2.3.3",
-      "resolved": "https://registry.npmjs.org/mquery/-/mquery-2.3.3.tgz",
-      "integrity": "sha512-NC8L14kn+qxJbbJ1gbcEMDxF0sC3sv+1cbRReXXwVvowcwY1y9KoVZFq0ebwARibsadu8lx8nWGvm3V0Pf0ZWQ==",
+      "version": "3.2.5",
+      "resolved": "https://registry.npmjs.org/mquery/-/mquery-3.2.5.tgz",
+      "integrity": "sha512-VjOKHHgU84wij7IUoZzFRU07IAxd5kWJaDmyUzQlbjHjyoeK5TNeeo8ZsFDtTYnSgpW6n/nMNIHvE3u8Lbrf4A==",
       "requires": {
-        "bluebird": "3.5.0",
-        "debug": "2.6.9",
-        "regexp-clone": "0.0.1",
-        "sliced": "0.0.5"
+        "bluebird": "3.5.1",
+        "debug": "3.1.0",
+        "regexp-clone": "^1.0.0",
+        "safe-buffer": "5.1.2",
+        "sliced": "1.0.1"
       },
       "dependencies": {
-        "sliced": {
-          "version": "0.0.5",
-          "resolved": "https://registry.npmjs.org/sliced/-/sliced-0.0.5.tgz",
-          "integrity": "sha1-XtwETKTrb3gW1Qui/GPiXY/kcH8="
+        "debug": {
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-3.1.0.tgz",
+          "integrity": "sha512-OX8XqP7/1a9cqkxYw2yXss15f26NKWBpDXQd0/uK/KPqdQhxbPa994hnzjcE2VqQpDslf55723cKPUOGSmMY3g==",
+          "requires": {
+            "ms": "2.0.0"
+          }
         }
       }
     },
@@ -2636,11 +2671,6 @@
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
       "integrity": "sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g="
     },
-    "muri": {
-      "version": "1.3.0",
-      "resolved": "https://registry.npmjs.org/muri/-/muri-1.3.0.tgz",
-      "integrity": "sha512-FiaFwKl864onHFFUV/a2szAl7X0fxVlSKNdhTf+BM8i8goEgYut8u5P9MqQqIYwvaMxjzVESsoEm/2kfkFH1rg=="
-    },
     "mute-stream": {
       "version": "0.0.7",
       "resolved": "https://registry.npmjs.org/mute-stream/-/mute-stream-0.0.7.tgz",
@@ -2861,6 +2891,11 @@
         }
       }
     },
+    "optional-require": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/optional-require/-/optional-require-1.0.3.tgz",
+      "integrity": "sha512-RV2Zp2MY2aeYK5G+B/Sps8lW5NHAzE5QClbFP15j+PWmP+T9PxlJXBOOLoSAdgwFvS4t0aMR4vpedMkbHfh0nA=="
+    },
     "optionator": {
       "version": "0.8.2",
       "resolved": "https://registry.npmjs.org/optionator/-/optionator-0.8.2.tgz",
@@ -3118,9 +3153,9 @@
       "dev": true
     },
     "process-nextick-args": {
-      "version": "1.0.7",
-      "resolved": "https://registry.npmjs.org/process-nextick-args/-/process-nextick-args-1.0.7.tgz",
-      "integrity": "sha1-FQ4gt1ZZCtP5EJPyWk8q2L/zC6M="
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/process-nextick-args/-/process-nextick-args-2.0.1.tgz",
+      "integrity": "sha512-3ouUOpQhtgrbOa17J7+uxOTpITYWaGP7/AhoR3+A+/1e9skrzelGi/dXzEYyvbxubEF6Wn2ypscTKiKJFFn1ag=="
     },
     "progress": {
       "version": "2.0.3",
@@ -3278,16 +3313,16 @@
       }
     },
     "readable-stream": {
-      "version": "2.2.7",
-      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.2.7.tgz",
-      "integrity": "sha1-BwV6y+JGeyIELTb5jFrVBwVOlbE=",
+      "version": "2.3.7",
+      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.7.tgz",
+      "integrity": "sha512-Ebho8K4jIbHAxnuxi7o42OrZgF/ZTNcsZj6nRKyUmkhLFq8CHItp/fy6hQZuZmP/n3yZ9VBUbp4zz/mX8hmYPw==",
       "requires": {
-        "buffer-shims": "~1.0.0",
         "core-util-is": "~1.0.0",
-        "inherits": "~2.0.1",
+        "inherits": "~2.0.3",
         "isarray": "~1.0.0",
-        "process-nextick-args": "~1.0.6",
-        "string_decoder": "~1.0.0",
+        "process-nextick-args": "~2.0.0",
+        "safe-buffer": "~5.1.1",
+        "string_decoder": "~1.1.1",
         "util-deprecate": "~1.0.1"
       }
     },
@@ -3302,9 +3337,9 @@
       }
     },
     "regexp-clone": {
-      "version": "0.0.1",
-      "resolved": "https://registry.npmjs.org/regexp-clone/-/regexp-clone-0.0.1.tgz",
-      "integrity": "sha1-p8LgmJH9vzj7sQ03b7cwA+aKxYk="
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/regexp-clone/-/regexp-clone-1.0.0.tgz",
+      "integrity": "sha512-TuAasHQNamyyJ2hb97IuBEif4qBHGjPHBS64sZwytpLEqtBQ1gPJTnOaQ6qmpET16cK14kkjbazl6+p0RRv0yw=="
     },
     "regexpp": {
       "version": "2.0.1",
@@ -3352,6 +3387,11 @@
         "uuid": "^3.3.2"
       }
     },
+    "require-at": {
+      "version": "1.0.6",
+      "resolved": "https://registry.npmjs.org/require-at/-/require-at-1.0.6.tgz",
+      "integrity": "sha512-7i1auJbMUrXEAZCOQ0VNJgmcT2VOKPRl2YGJwgpHpC9CE91Mv4/4UYIUm4chGJaI381ZDq1JUicFii64Hapd8g=="
+    },
     "require-directory": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/require-directory/-/require-directory-2.1.1.tgz",
@@ -3369,15 +3409,6 @@
       "integrity": "sha1-l/cXtp1IeE9fUmpsWqj/3aBVpNE=",
       "dev": true
     },
-    "require_optional": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/require_optional/-/require_optional-1.0.1.tgz",
-      "integrity": "sha512-qhM/y57enGWHAe3v/NcwML6a3/vfESLe/sGM2dII+gEO0BpKRUkWZow/tyloNqJyN6kXSl3RyyM8Ll5D/sJP8g==",
-      "requires": {
-        "resolve-from": "^2.0.0",
-        "semver": "^5.1.0"
-      }
-    },
     "resolve": {
       "version": "1.10.0",
       "resolved": "https://registry.npmjs.org/resolve/-/resolve-1.10.0.tgz",
@@ -3396,11 +3427,6 @@
         "global-modules": "^1.0.0"
       }
     },
-    "resolve-from": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/resolve-from/-/resolve-from-2.0.0.tgz",
-      "integrity": "sha1-lICrIOlP+h2egKgEx+oUdhGWa1c="
-    },
     "resolve-url": {
       "version": "0.2.1",
       "resolved": "https://registry.npmjs.org/resolve-url/-/resolve-url-0.2.1.tgz",
@@ -3482,6 +3508,15 @@
       "resolved": "https://registry.npmjs.org/safer-buffer/-/safer-buffer-2.1.2.tgz",
       "integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg=="
     },
+    "saslprep": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/saslprep/-/saslprep-1.0.3.tgz",
+      "integrity": "sha512-/MY/PEMbk2SuY5sScONwhUDsV2p77Znkb/q3nSVstq/yQzYJOH/Azh29p9oJLsl3LnQwSvZDKagDGBsBwSooag==",
+      "optional": true,
+      "requires": {
+        "sparse-bitfield": "^3.0.3"
+      }
+    },
     "semver": {
       "version": "5.6.0",
       "resolved": "https://registry.npmjs.org/semver/-/semver-5.6.0.tgz",
@@ -3593,6 +3628,11 @@
       "integrity": "sha1-2kL0l0DAtC2yypcoVxyxkMmO/qM=",
       "dev": true
     },
+    "sift": {
+      "version": "13.5.2",
+      "resolved": "https://registry.npmjs.org/sift/-/sift-13.5.2.tgz",
+      "integrity": "sha512-+gxdEOMA2J+AI+fVsCqeNn7Tgx3M9ZN9jdi95939l1IJ8cZsqS8sqpJyOkic2SJk+1+98Uwryt/gL6XDaV+UZA=="
+    },
     "signal-exit": {
       "version": "3.0.2",
       "resolved": "https://registry.npmjs.org/signal-exit/-/signal-exit-3.0.2.tgz",
@@ -3613,7 +3653,7 @@
     "sliced": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/sliced/-/sliced-1.0.1.tgz",
-      "integrity": "sha1-CzpmK10Ewxd7GSa+qCsD+Dei70E="
+      "integrity": "sha512-VZBmZP8WU3sMOZm1bdgTadsQbcscK0UM8oKxKVBs4XAhUo2Xxzm/OFMGBkPusxw9xL3Uy8LrzEqGqJhclsr0yA=="
     },
     "snapdragon": {
       "version": "0.8.2",
@@ -3859,6 +3899,15 @@
       "integrity": "sha1-PpNdfd1zYxuXZZlW1VEo6HtQhKM=",
       "dev": true
     },
+    "sparse-bitfield": {
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/sparse-bitfield/-/sparse-bitfield-3.0.3.tgz",
+      "integrity": "sha512-kvzhi7vqKTfkh0PZU+2D2PIllw2ymqJKujUcyPMd9Y75Nv4nPbGJZXNhxsgdQab2BmlDct1YnfQCguEvHr7VsQ==",
+      "optional": true,
+      "requires": {
+        "memory-pager": "^1.0.2"
+      }
+    },
     "spawn-command": {
       "version": "0.0.2-1",
       "resolved": "https://registry.npmjs.org/spawn-command/-/spawn-command-0.0.2-1.tgz",
@@ -3961,9 +4010,9 @@
       }
     },
     "string_decoder": {
-      "version": "1.0.3",
-      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.0.3.tgz",
-      "integrity": "sha512-4AH6Z5fzNNBcH+6XDMfA/BTt87skxqJlO0lAh3Dker5zThcAxG6mKz+iGu308UKoPPQ8Dcqx/4JhujzltRa+hQ==",
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
+      "integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
       "requires": {
         "safe-buffer": "~5.1.0"
       }
@@ -4293,7 +4342,7 @@
     "util-deprecate": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
-      "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8="
+      "integrity": "sha512-EPD5q1uXyFxJpCrLnCc1nHnq3gOa6DZBocAIiI2TaSCA7VCJ1UJDMagCzIkXNsUYfD1daK//LTEQ8xiIbrHtcw=="
     },
     "utils-merge": {
       "version": "1.0.1",
diff --git a/package.json b/package.json
index 616d9fe..10d64b3 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,7 @@
     "concurrently": "^3.5.1",
     "ejs": "~2.5.7",
     "express": "^4.16.0",
-    "mongoose": "^4.10.8",
+    "mongoose": "^5.13.15",
     "morgan": "^1.9.0",
     "node-fetch": "^2.6.0",
     "rlp": "^2.0.0",