Port starter architecture dependencies to null safety (#10)

* Update alert_dialogs to null safety

* Update custom_buttons to null safety

* Update string_validators to null safety

* Fix return type in ShowExceptionAlertDialog

* Update email & password code

* Start porting email & password tests

* Disable email & password tests until solution found for mocking with null safety

* Restore git dependencies to other packages

* Update firestore_service to null safety

* Fix email & password tests by adding codegen step for mocks

* Depend on null-safety branch

* Update packages to null-safe dependencies

* snapshot.data() is nullable, so should be the builder arguments

* Change a function argument to nullable

packages/alert_dialogs/lib/show_alert_dialog.dart

@@ -1,11 +1,11 @@
 part of alert_dialogs;
 
-Future<bool> showAlertDialog({
-  @required BuildContext context,
-  @required String title,
-  @required String content,
-  String cancelActionText,
-  @required String defaultActionText,
+Future<bool?> showAlertDialog({
+  required BuildContext context,
+  required String title,
+  required String content,
+  String? cancelActionText,
+  required String defaultActionText,
 }) async {
   if (kIsWeb || !Platform.isIOS) {
     return showDialog(

packages/alert_dialogs/lib/show_exception_alert_dialog.dart

@@ -1,9 +1,9 @@
 part of alert_dialogs;
 
 Future<void> showExceptionAlertDialog({
-  @required BuildContext context,
-  @required String title,
-  @required dynamic exception,
+  required BuildContext context,
+  required String title,
+  required dynamic exception,
 }) =>
     showAlertDialog(
       context: context,
@@ -14,10 +14,10 @@ Future<void> showExceptionAlertDialog({
 
 String _message(dynamic exception) {
   if (exception is FirebaseException) {
-    return exception.message;
+    return exception.message ?? exception.toString();
   }
   if (exception is PlatformException) {
-    return exception.message;
+    return exception.message ?? exception.toString();
   }
   return exception.toString();
 }

packages/alert_dialogs/pubspec.lock

@@ -7,77 +7,70 @@ packages:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.4.2"
+    version: "2.5.0"
   boolean_selector:
     dependency: transitive
     description:
       name: boolean_selector
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.0"
+    version: "2.1.0"
   characters:
     dependency: transitive
     description:
       name: characters
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.0"
+    version: "1.1.0"
   charcode:
     dependency: transitive
     description:
       name: charcode
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.3"
+    version: "1.2.0"
   clock:
     dependency: transitive
     description:
       name: clock
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.1"
+    version: "1.1.0"
   collection:
     dependency: transitive
     description:
       name: collection
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.14.13"
+    version: "1.15.0"
   fake_async:
     dependency: transitive
     description:
       name: fake_async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0"
-  firebase:
-    dependency: transitive
-    description:
-      name: firebase
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "7.3.0"
+    version: "1.2.0"
   firebase_core:
     dependency: "direct main"
     description:
       name: firebase_core
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.5.0"
+    version: "1.0.0"
   firebase_core_platform_interface:
     dependency: transitive
     description:
       name: firebase_core_platform_interface
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.0"
+    version: "4.0.0"
   firebase_core_web:
     dependency: transitive
     description:
       name: firebase_core_web
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.0"
+    version: "1.0.0"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -93,69 +86,41 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
-  http:
-    dependency: transitive
-    description:
-      name: http
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.12.2"
-  http_parser:
-    dependency: transitive
-    description:
-      name: http_parser
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "3.1.4"
   js:
     dependency: transitive
     description:
       name: js
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.6.2"
+    version: "0.6.3"
   matcher:
     dependency: transitive
     description:
       name: matcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.8"
+    version: "0.12.10"
   meta:
     dependency: transitive
     description:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.8"
+    version: "1.3.0"
   path:
     dependency: transitive
     description:
       name: path
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.7.0"
-  pedantic:
-    dependency: transitive
-    description:
-      name: pedantic
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.9.0"
+    version: "1.8.0"
   plugin_platform_interface:
     dependency: transitive
     description:
       name: plugin_platform_interface
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.2"
-  quiver:
-    dependency: transitive
-    description:
-      name: quiver
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.1.3"
+    version: "2.0.0"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -167,56 +132,56 @@ packages:
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.7.0"
+    version: "1.8.0"
   stack_trace:
     dependency: transitive
     description:
       name: stack_trace
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.9.5"
+    version: "1.10.0"
   stream_channel:
     dependency: transitive
     description:
       name: stream_channel
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.0"
+    version: "2.1.0"
   string_scanner:
     dependency: transitive
     description:
       name: string_scanner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.5"
+    version: "1.1.0"
   term_glyph:
     dependency: transitive
     description:
       name: term_glyph
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0"
+    version: "1.2.0"
   test_api:
     dependency: transitive
     description:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.17"
+    version: "0.2.19"
   typed_data:
     dependency: transitive
     description:
       name: typed_data
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0"
+    version: "1.3.0"
   vector_math:
     dependency: transitive
     description:
       name: vector_math
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.8"
+    version: "2.1.0"
 sdks:
-  dart: ">=2.9.0-14.0.dev <3.0.0"
-  flutter: ">=1.12.13+hotfix.5 <2.0.0"
+  dart: ">=2.12.0 <3.0.0"
+  flutter: ">=1.12.13+hotfix.5"

packages/alert_dialogs/pubspec.yaml

@@ -1,16 +1,16 @@
 name: alert_dialogs
 description: Helper methods for showing alert dialogs
-version: 0.1.0
+version: 0.2.0
 author: Andrea Bizzotto
 homepage: https://www.codewithandrea.com
 
 environment:
-  sdk: ">=2.7.0 <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
 
 dependencies:
   flutter:
     sdk: flutter
-  firebase_core: ^0.5.0
+  firebase_core: ^1.0.0
 
 dev_dependencies:
   flutter_test:

packages/custom_buttons/lib/custom_raised_button.dart

@@ -3,8 +3,8 @@ part of custom_buttons;
 @immutable
 class CustomRaisedButton extends StatelessWidget {
   const CustomRaisedButton({
-    Key key,
-    @required this.child,
+    Key? key,
+    required this.child,
     this.color,
     this.textColor,
     this.height = 50.0,
@@ -13,12 +13,12 @@ class CustomRaisedButton extends StatelessWidget {
     this.onPressed,
   }) : super(key: key);
   final Widget child;
-  final Color color;
-  final Color textColor;
+  final Color? color;
+  final Color? textColor;
   final double height;
   final double borderRadius;
   final bool loading;
-  final VoidCallback onPressed;
+  final VoidCallback? onPressed;
 
   Widget buildSpinner(BuildContext context) {
     final ThemeData data = Theme.of(context);

packages/custom_buttons/lib/form_submit_button.dart

@@ -2,10 +2,10 @@ part of custom_buttons;
 
 class FormSubmitButton extends CustomRaisedButton {
   FormSubmitButton({
-    Key key,
-    String text,
+    Key? key,
+    required String text,
     bool loading = false,
-    VoidCallback onPressed,
+    VoidCallback? onPressed,
   }) : super(
           key: key,
           child: Text(