Combine workflows

.github/workflows/ci.yml

@@ -0,0 +1,33 @@
+name: ci
+
+on:
+  push:
+    branches: [ main ]
+  pull_request_target:
+    branches: [ main ]
+
+jobs:
+  test-ubuntu:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        submodules: 'recursive'
+    - name: Install dotfiles
+      run: ./install
+  test-windows:
+    runs-on: windows-latest
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        submodules: 'recursive'
+    - name: Install dotfiles
+      run: .\install-windows.ps1
+  dependabot-auto-merge:
+    needs: [test-ubuntu, test-windows]
+    runs-on: ubuntu-latest
+    if: ${{ github.event_name == 'pull_request_target' && github.actor == 'dependabot[bot]' }}
+    steps:
+      - uses: fastify/[email protected]
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}