init

.github/workflows/build.yml

@@ -0,0 +1,31 @@
+name: build
+
+on: [push]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [8.x, 10.x, 12.x]
+
+    steps:
+    - uses: actions/checkout@v1
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node-version }}
+    - name: npm install, build, and test
+      run: |
+        npm ci
+        npm run build --if-present
+        npm test
+      env:
+        CI: true
+    - name: Coveralls GitHub Action
+      uses: coverallsapp/github-action@v1.0.1 
+      with: 
+        token: ${{ secrets.CODECOV_TOKEN }}
+        github-token: ${{ secrets.github_token }}

.gitignore

@@ -0,0 +1,2 @@
+node_modules
+coverage

jest.config.js

@@ -0,0 +1,5 @@
+module.exports = {
+  preset: 'ts-jest',
+  testEnvironment: 'node',
+  notify: true
+};