chore: Use github workflows

Author: danez

.github/workflows/build.yml

@@ -0,0 +1,77 @@
+
+name: CI
+
+on:
+  push:
+    branches:
+      - 5.x
+
+env:
+  NODE_VERSION: 16
+
+jobs:
+  tests:
+    strategy:
+      matrix:
+        node: [ '12', '14', '16' ]
+    name: Unit tests (Node v${{ matrix.node }})
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v2
+
+    - name: Setup Node.js
+      uses: actions/setup-node@v2
+      with:
+        node-version: ${{ matrix.node }}
+        cache: 'yarn'
+
+    - name: Cache node_modules
+      uses: actions/cache@v2
+      id: cache-nodemodules
+      with:
+        path: node_modules
+        key: ${{ runner.os }}-${{ env.NODE_VERSION }}-nodemodules-${{ hashFiles('**/yarn.lock') }}
+
+    - name: Install dependencies
+      if: steps.cache-nodemodules.outputs.cache-hit != 'true'
+      run: yarn install --frozen-lockfile --non-interactive
+
+    - name: Build
+      run: yarn build
+
+    - name: Unit tests
+      run: yarn test --ci
+
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v2
+
+    - name: Setup Node.js
+      uses: actions/setup-node@v2
+      with:
+        node-version: ${{ env.NODE_VERSION }}
+        cache: 'yarn'
+
+    - name: Cache node_modules
+      uses: actions/cache@v2
+      id: cache-nodemodules
+      with:
+        path: node_modules
+        key: ${{ runner.os }}-${{ env.NODE_VERSION }}-nodemodules-${{ hashFiles('**/yarn.lock') }}
+
+    - name: Install dependencies
+      if: steps.cache-nodemodules.outputs.cache-hit != 'true'
+      run: yarn install --frozen-lockfile --non-interactive
+
+    - name: Install website dependencies
+      run: yarn install --frozen-lockfile --non-interactive
+      working-directory: ./website
+
+    - name: Lint
+      run: yarn lint