chore: move unit test from travis ci to github actions

.github/workflows/unit-test.yml

@@ -0,0 +1,22 @@
+name: Unit Test
+
+on: [push]
+
+jobs:
+  build:
+
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        node: [8, 10, 12]
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js ${{ matrix.node }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node }}
+    - run: npm install
+    - run: npm run lint
+    - run: npm run test:report

README.md

@@ -4,7 +4,7 @@
   <h1 align="center">Alexa Skills Kit Command Line interface</h1>
   <p align="center">
     <a href="https://www.npmjs.com/package/ask-cli"><img src="https://badge.fury.io/js/ask-cli.svg"></a>
-    <a href="https://travis-ci.org/alexa/ask-cli"><img src="https://travis-ci.org/alexa/ask-cli.svg?branch=master"></a>
+    <a href="https://github.com/alexa/ask-cli/actions?query=workflow%3A%22Unit+Test%22"><img src="https://github.com/alexa/ask-cli/workflows/Unit%20Test/badge.svg?branch=master"></a>
   </p>
   <p align="center">
     <a href="https://conventionalcommits.org"><img src="https://img.shields.io/badge/Conventional%20Commits-1.0.0-yellow.svg"></a>