Personal flutter all-in-one package.

Features

Add serveral extensions and function for my flutter development.

workflow

1. Add features
   1. Check if new features (files) are added to lib/src/halo.dart
   2. Write Unit Test if possible
2. Update version in pubspec.yaml
3. Update CHANGELOG.md
4. Run flutter pub publish
5. git add .;git add .;git add .;git commit -m 'New feature'; git fetch;