Switch to GitHub actions for CI

.github/workflows/node.js.yml

+# This workflow will do a clean install of node dependencies, build the source code and run tests across different versions of node
+# For more information see: https://help.github.com/actions/language-and-framework-guides/using-nodejs-with-github-actions
+
+name: Node.js CI
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js 14.x
+      uses: actions/setup-node@v1
+      with:
+        node-version: 14.x
+    - run: npm install -g codecov
+    - run: npm install
+    - run: npm test
+    - run: codecov

.travis.yml

-sudo: false
-
-language: node_js
-node_js:
-  - 'lts/*'
-
-before_install:
-  - npm install
-  - npm install codecov.io coveralls
-
-after_success:
-  - cat ./coverage/lcov.info | ./node_modules/codecov.io/bin/codecov.io.js
-  - cat ./coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js