Updated dependencies (#255)

* Bump android compile and target version, also flutter dependencies and resolve issues

* Remove deprecated splashscreen and added support for new Android 12 version.

* Updated workflow action versions and flutter sdk

* Resolved linting issues

* Resolved test binding issues

test/setup.dart

@@ -0,0 +1,22 @@
+
+import "package:flutter/services.dart";
+import "package:flutter_test/flutter_test.dart";
+
+// This is the same as the following issue except it keeps the http client
+// TestWidgetsFlutterBinding.ensureInitialized();
+class CustomBinding extends AutomatedTestWidgetsFlutterBinding {
+  @override
+  bool get overrideHttpClient => false;
+}
+
+void setupTestEnv() {
+  // Uses custom binding to not override the http client
+  CustomBinding();
+
+  // Mock the path provider
+  const MethodChannel channel = MethodChannel("plugins.flutter.io/path_provider");
+  TestDefaultBinaryMessengerBinding.instance?.defaultBinaryMessenger
+      .setMockMethodCallHandler(channel, (MethodCall methodCall) async {
+    return ".";
+  });
+}