ci: add GitHub Actions for CI (#879)

* ci: add GitHub Actions for CI

* ci: run CI for pull requets and push to master, next

* Update test.yml

.github/workflows/test.yml

@@ -0,0 +1,26 @@
+name: TypeCheck, Lint, and Test
+
+on:
+  push:
+    branches:
+      - master
+      - next
+  pull_request:
+
+jobs:
+  test:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js
+      uses: actions/setup-node@v1
+      with:
+        node-version: '14.x'
+    - run: yarn install
+    - run: yarn types:check
+    - run: yarn lint
+    - run: yarn test
+      env:
+        CI: true