Use Github actions for CI

Author: lukemelia

.github/workflows/ci.yml

@@ -0,0 +1,41 @@
+name: 'CI'
+on:
+  pull_request:
+    branches: [master]
+
+jobs:
+  test_and_lint:
+    name: 'Test'
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+
+    steps:
+    - uses: actions/checkout@v2
+    - uses: volta-cli/action@v1
+
+    - name: Get package manager's global cache path
+      id: global-cache-dir-path
+      run: echo "::set-output name=dir::$(yarn cache dir)"
+
+    - name: Cache package manager's global cache and node_modules
+      id: cache-dependencies
+      uses: actions/cache@v2
+      with:
+        path: |
+          ${{ steps.global-cache-dir-path.outputs.dir }}
+          node_modules
+        key: ${{ runner.os }}-${{ matrix.node-version }}-${{
+          hashFiles('**/yarn.lock'
+          ) }}
+        restore-keys: |
+          ${{ runner.os }}-${{ matrix.node-version }}-
+
+    - name: Install
+      run: yarn install
+
+    - name: Run tests and linting
+      run: yarn test
+
+
+
+