CI: consolidate check actions

.github/workflows/check.yml

@@ -0,0 +1,29 @@
+name: Check
+
+on:
+  push:
+    branches-ignore:
+      - 'integration/**'
+  pull_request:
+
+jobs:
+  check:
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        node: [14]
+        check: [check-compiled-i18n, check-source-formatting, check-types, lint]
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Use Node.js ${{ matrix.node }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node }}
+
+    - run: cp config.cli.js config.js
+    - run: npm install
+    - run: npm run ${{ matrix.check }}