Swap out Travis CI for GitHub action

.github/workflows/build.yml

@@ -0,0 +1,27 @@
+# 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: build
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [10.x, 12.x, 14.x]
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node-version }}
+    - run: npm install
+    - run: npm run test

README.md

@@ -1,6 +1,5 @@
+[![build](https://github.com/osmlab/ohauth/workflows/build/badge.svg)](https://github.com/osmlab/ohauth/actions?query=workflow%3A%22build%22)
 [![npm version](https://badge.fury.io/js/ohauth.svg)](https://badge.fury.io/js/ohauth)
-[![Build Status](https://travis-ci.org/osmlab/ohauth.svg?branch=master)](https://travis-ci.org/osmlab/ohauth)
-[![Greenkeeper badge](https://badges.greenkeeper.io/osmlab/ohauth.svg)](https://greenkeeper.io/)
 
 
 ## ohauth