Remove js-interop workaround

Dart 3.3 had the problem of some JS-interop methods declared to return
a `JSBoolean` actually returning a Dart `bool`, causing compilation
errors.
Now that dart-lang/sdk#55024 has been fixed
in Dart 3.4, the workarounds introduced to fix the issue can be
reverted.

Author: simolus3

sqlite3/example/web/worker.dart

@@ -18,8 +18,7 @@ void main() {
   Future<void> handleEvent(web.MessageEvent event) async {
     final data = event.data;
 
-    // should be toDart, https://github.com/dart-lang/sdk/issues/55024
-    if (data.equals('start'.toJS) as bool) {
+    if (data.equals('start'.toJS).toDart) {
       final options = WasmVfs.createOptions();
       final worker = web.Worker(''); // Clone this worker
       worker.postMessage(options);

sqlite3/lib/src/wasm/js_interop/core.dart

@@ -33,10 +33,8 @@ extension type JsBigInt(JSBigInt _jsBigInt) implements JSBigInt {
     const maxSafeInteger = 9007199254740992;
     const minSafeInteger = -maxSafeInteger;
 
-    // These should use toDart instead of as bool after
-    //  https://github.com/dart-lang/sdk/issues/55024
-    return minSafeInteger.toJS.lessThanOrEqualTo(_jsBigInt) as bool &&
-        _jsBigInt.lessThanOrEqualTo(maxSafeInteger.toJS) as bool;
+    return minSafeInteger.toJS.lessThanOrEqualTo(_jsBigInt).toDart &&
+        _jsBigInt.lessThanOrEqualTo(maxSafeInteger.toJS).toDart;
   }
 
   Object toDart() {

sqlite3/pubspec.yaml

@@ -5,7 +5,7 @@ homepage: https://github.com/simolus3/sqlite3.dart/tree/main/sqlite3
 issue_tracker: https://github.com/simolus3/sqlite3.dart/issues
 
 environment:
-  sdk: '>=3.3.0 <4.0.0'
+  sdk: '>=3.4.0 <4.0.0'
 
 # This package supports all platforms listed below.
 platforms: