Bump minimum supported zend-expressive-authentication version to 1.0

Now that 1.0 is released and stable, we should no longer support
pre-release versions.

All tests continue to pass.

Author: weierophinney

composer.json

@@ -21,7 +21,7 @@
         "php": "^7.1",
         "psr/container": "^1.0",
         "psr/http-message": "^1.0.1",
-        "zendframework/zend-expressive-authentication": "^0.4.0 || ^1.0"
+        "zendframework/zend-expressive-authentication": "^1.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^7.0.1",