Replace Travis with GitHub Actions

* builds with go 1.17

Author: Mongey

.github/workflows/ci.yml

@@ -0,0 +1,15 @@
+name: CI
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Set up Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: 1.17.x
+      - run: go test ./...

.travis.yml

@@ -3,7 +3,7 @@
 ![](https://f.cloud.github.com/assets/846194/628861/8090cb46-d104-11e2-84eb-7878aa9057d0.gif)
 
 ## Overview
-[![Build Status](https://api.travis-ci.org/pearkes/get.png?branch=master)](https://travis-ci.org/pearkes/gethub)
+[![Build Status](https://github.com/pearkes/gethub/actions/workflows/ci.yml/badge.svg)](https://github.com/pearkes/gethub/actions/workflows/ci.yml)
 
 `gethub` helps you keep all of your git repositories that have GitHub
 remotes up to date.