github action update

.github/workflows/update.yml

@@ -0,0 +1,21 @@
+name: update
+on: push
+
+jobs:
+  update:
+    name: Fastlane Update
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Set up ruby env
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: 2.7.2
+          bundler-cache: true
+
+      - name: Run tests
+        run: bundle exec fastlane android test
+
+      - name: Run slack_build
+        run: bundle exec fastlane slack_build