chore: switch from travis to github actions for ci

Author: nlf

.github/workflows/ci.yml

@@ -0,0 +1,35 @@
+name: CI
+on: [push, pull_request]
+jobs:
+  test:
+    strategy:
+      fail-fast: false
+      matrix:
+        node-version: ['10.1', 10.x, '12.1', 12.x, '14.1', 14.x]
+        platform:
+          - os: ubuntu-latest
+            shell: bash
+          - os: macos-latest
+            shell: bash
+          - os: windows-latest
+            shell: bash
+          - os: windows-latest
+            shell: powershell
+
+    runs-on: ${{ matrix.platform.os }}
+    defaults:
+      run:
+        shell: ${{ matrix.platform.shell }}
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v2
+      with:
+        node-version: ${{ matrix.node-version }}
+    - name: Update npm
+      run: npm i -g npm
+    - name: Install dependencies
+      run: npm ci
+    - name: Run Tap tests
+      run: npm test