Move from travis to github actions for CI

Author: lukemelia

.github/workflows/ci.yml

@@ -0,0 +1,51 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+
+env:
+  NODE_VERSION: '12.x'
+
+jobs:
+  test:
+    name: Tests
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        fetch-depth: 1
+
+    - uses: actions/setup-node@v2-beta
+      with:
+        node-version: '${{ env.NODE_VERSION }}'
+
+    - name: Get package manager's global cache path
+      id: global-cache-dir-path
+      run: echo "::set-output name=dir::$(yarn cache dir)"
+
+    - name: Cache package manager's global cache and node_modules
+      id: cache-dependencies
+      uses: actions/cache@v2
+      with:
+        path: |
+          ${{ steps.global-cache-dir-path.outputs.dir }}
+          node_modules
+        key: v1-${{ runner.os }}-${{ matrix.node-version }}-${{
+          hashFiles('**/yarn.lock'
+          ) }}
+        restore-keys: |
+          v1-${{ runner.os }}-${{ matrix.node-version }}-
+
+    - name: Install Dependencies
+      run: yarn install --no-lockfile
+      if: |
+        steps.cache-dependencies.outputs.cache-hit != 'true'
+
+    - name: Test
+      run: yarn test
+
+