Update `CHANGELOG.md`, `flutter_quill` version to 7.1.9 and `flutter_quill_extension` version to 0.2.1+1 (#1186)

flutter_quill_extensions/pubspec.yaml

@@ -1,18 +1,18 @@
 name: flutter_quill_extensions
 description: Embed extensions for flutter_quill including image, video, formula and etc.
-version: 0.2.1
+version: 0.2.1+1
 homepage: https://bulletjournal.us/home/index.html
 repository: https://github.com/singerdmx/flutter-quill/tree/master/flutter_quill_extensions
 
 environment:
-  sdk: ">=2.12.0 <3.0.0"
+  sdk: ">=2.17.0 <3.0.0"
   flutter: ">=3.0.0"
 
 dependencies:
   flutter:
     sdk: flutter
 
-  flutter_quill: ^7.1.7
+  flutter_quill: ^7.1.8
 
   image_picker: ^0.8.5+3
   photo_view: ^0.14.0

pubspec.yaml

@@ -1,6 +1,6 @@
 name: flutter_quill
 description: A rich text editor supporting mobile and web (Demo App @ bulletjournal.us)
-version: 7.1.8
+version: 7.1.9
 #author: bulletjournal
 homepage: https://bulletjournal.us/home/index.html
 repository: https://github.com/singerdmx/flutter-quill