CI: run rspec in GitHub Actions

.github/workflows/rspec.yml

@@ -0,0 +1,32 @@
+name: Test
+
+on: [push]
+
+jobs:
+  build:
+
+    # Note:
+    # Maybe can use linux image
+    runs-on: macos-latest
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Cache bundler
+      uses: actions/cache@v1
+      with:
+        path: vendor/bundle
+        key: bundler-${{ hashFiles('Gemfile.lock') }}
+        restore-keys: |
+          bundler-${{ hashFiles('Gemfile.lock') }}
+
+    - name: Setup
+      run: |
+        bundle
+
+    - name: Run test
+      run: |
+        rake test
+
+    env:
+      DANGER_GITHUB_API_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/main.yml → .github/workflows/rubocop.yml

@@ -1,4 +1,4 @@
-name: Run danger
+name: Rubocop
 
 on: [pull_request]