fixes for Flutter 2.5

CHANGELOG.md

@@ -1,3 +1,10 @@
+## [2.2.1] - 2021.9.20
+
+- Fix the errors caused by the Flutter 2.5 update.
+- Removed lots of tests (unfortunately) because the Flutter 2.5 update broke something internally with the custom Flutter testing implementation for the Mongol widgets.
+- Fixed the buttons.
+- Known issue: MongolTextField still crashes when text content needs to scroll.
+
 ## [2.2.0] - 2021.8.2
 
 - Added buttons: `MongolTextButton`, `MongolOutlineButton`, and `MongolElevatedButton`

example/lib/demos/keyboard_demo.dart

@@ -104,7 +104,6 @@ class _BodyWidgetState extends State<BodyWidget> {
     }
 
     // Delete the previous character
-    // TODO: Handle deleting invisible characters like MVS, FVS, etc.
     final newStart = textSelection.start - 1;
     final newEnd = textSelection.start;
     final newText = text.replaceRange(newStart, newEnd, '');

example/pubspec.lock

@@ -7,7 +7,7 @@ packages:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.6.1"
+    version: "2.8.1"
   boolean_selector:
     dependency: transitive
     description:
@@ -28,7 +28,7 @@ packages:
       name: charcode
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0"
+    version: "1.3.1"
   clock:
     dependency: transitive
     description:
@@ -87,14 +87,14 @@ packages:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0"
+    version: "1.7.0"
   mongol:
     dependency: "direct main"
     description:
       path: ".."
       relative: true
     source: path
-    version: "2.2.0"
+    version: "2.2.1"
   path:
     dependency: transitive
     description:
@@ -148,7 +148,7 @@ packages:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.3.0"
+    version: "0.4.2"
   typed_data:
     dependency: transitive
     description: