Fix DriftWebOptions.onResult not being called

Closes https://github.com/simolus3/drift/discussions/3604

drift_flutter/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.2.5-dev
+
+- Fix `DriftWebOptions.onResult` not being called.
+
 ## 0.2.4
 
 - Allow providing a custom temporary directory.

drift_flutter/lib/src/web.dart

@@ -20,14 +20,17 @@ QueryExecutor driftDatabase({
       driftWorkerUri: web.driftWorker,
     );
 
-    if (result.missingFeatures.isNotEmpty) {
-      // Depending how central local persistence is to your app, you may want
-      // to show a warning to the user if only unrealiable implemetentations
-      // are available.
-      print('Using ${result.chosenImplementation} due to missing browser '
-          'features: ${result.missingFeatures}');
-    }
-
+    (web.onResult ?? _defaultResultHandler)(result);
     return result.resolvedExecutor;
   }));
 }
+
+void _defaultResultHandler(WasmDatabaseResult result) {
+  if (result.missingFeatures.isNotEmpty) {
+    // Depending how central local persistence is to your app, you may want
+    // to show a warning to the user if only unrealiable implemetentations
+    // are available.
+    print('Using ${result.chosenImplementation} due to missing browser '
+        'features: ${result.missingFeatures}');
+  }
+}