Add dedicated lint action

Signed-off-by: Julius Härtl <jus@bitgrid.net>

.github/workflows/lint.yml

@@ -0,0 +1,45 @@
+name: Lint
+
+on:
+  pull_request:
+  push:
+    branches:
+      - master
+      - stable*
+
+jobs:
+  php:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        php-versions: ['7.2', '7.3', '7.4']
+
+    name: php${{ matrix.php-versions }} lint
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up php${{ matrix.php-versions }}
+        uses: shivammathur/setup-php@v1
+        with:
+          php-version: ${{ matrix.php-versions }}
+          coverage: none
+      - name: Lint
+        run: composer run lint
+
+  node:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [12.x]
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Use node ${{ matrix.node-version }}
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node-version }}
+      - name: Install dependencies
+        run: npm ci
+      - name: ESLint
+        run: npm run lint

.github/workflows/nodejs.yml

@@ -23,9 +23,4 @@ jobs:
     - name: build
       run: |
         npm run build --if-present
-    - name: eslint
-      run: |
-        npm run lint
-      env:
-        CI: true