CI: Run ESLint job with GitHub Actions

.github/workflows/ci-eslint.yml

@@ -0,0 +1,21 @@
+name: CI ESLint
+
+on:
+  push:
+    branches:
+      - '*'
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  eslint:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: recursive
+      - name: Install ESLint
+        run: npm install eslint@5.12.0 eslint-config-google@0.11.0 eslint-plugin-html@5.0.0 eslint-plugin-php-markup@0.2.5
+      - name: Run ESLint
+        run: npx eslint --ext .php,.js .

.travis.yml

@@ -32,7 +32,6 @@ install:
   - update-binfmts --enable qemu-arm
 
 env:
-  - SMPFLAGS=-j4 OS=eslint DIST=eslint
   - SMPFLAGS=-j4 OS=ubuntu DIST=bionic DOCKER_REPO=iconzm/packpack
 
 compiler: