ci: updates sheet workflow

-name: Flutter Test
-on:
-  push:
-    branches:
-      - master
-jobs:
-  build:
-    name: Sheet test
-    env:
-      my_secret: ${{secrets.commit_secret}}
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v1
-      - uses: subosito/flutter-action@v1
-        with:
-          channel: 'dev'
-      - run: |
-          cd sheet
-          flutter pub get
-      - run: |
-          tools/coverage.sh sheet

+name: Sheet
+on:
+  push:
+    branches:
+      - master
+      - main
+  pull_request:
+    paths:
+      - ".github/workflows/sheet.yaml"
+      - "sheet/**"
+jobs:
+
+  build:
+    uses: VeryGoodOpenSource/very_good_workflows/.github/workflows/flutter_package.yml@v1
+    with:
+      working_directory: sheet
+      min_coverage: 60 # Working to reach 100% XD
+
+  pana:
+    uses: VeryGoodOpenSource/very_good_workflows/.github/workflows/pana.yml@v1
+    with:
+      working_directory: sheet