feat: add cache key options (#87)

Author: renancaraujo

.github/workflows/flutter_package.yml

@@ -62,6 +62,7 @@ jobs:
           flutter-version: ${{inputs.flutter_version}}
           channel: ${{inputs.flutter_channel}}
           cache: true
+          cache-key: flutter-:os:-:channel:-:version:-:arch:-:hash:-${{ hashFiles('**/pubspec.lock') }}
 
       - name: 📦 Install Dependencies
         run: |