Create workflow pr.yml

.github/workflows/pr.yml

@@ -0,0 +1,21 @@
+name: PR_CI
+
+on: [pull_request]
+
+jobs:
+  test:
+    name: Test on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest]
+    steps:
+      - uses: actions/checkout@v1
+      - uses: actions/setup-java@v1
+        with:
+          java-version: '12.x'
+      - uses: subosito/flutter-action@v1
+        with:
+          flutter-version: '1.9.1+hotfix.6'
+      - run: flutter pub get
+      - run: flutter analyze lib example/lib