Update dart.yml

.github/workflows/dart.yml

@@ -1,6 +1,9 @@
 name: Dart CI
 
-on: [push]
+on:
+  push:
+    tags: 
+      - v*
 
 jobs:
   build:
@@ -11,11 +14,6 @@ jobs:
       image:  google/dart:latest
 
     steps:
-    - uses: actions/checkout@v1
-    - name: Install dependencies
-      run: pub get
-    - name: Run tests
-      run: pub run test
     - name: Publish Dart/Flutter package
       uses: sakebook/actions-flutter-pub-publisher@v1.2.1
       with: