remove travis and add GitHub workflow

.github/workflows/go.yml

@@ -1,12 +1,10 @@
-name: Go
+name: CI
 on: [push, pull_request]
 jobs:
-
   build:
     name: Build
     runs-on: ubuntu-latest
     steps:
-
     - name: Set up Go 1.13
       uses: actions/setup-go@v1
       with:

.travis.yml

@@ -1,17 +0,0 @@
-language: go
-
-go:
-  - 1.8.x
-  - 1.10.x
-  - 1.12.x
-  - 1.13.x
-
-script:
-  - go test -race -coverprofile=coverage.txt -covermode=atomic
-
-after_success:
-  - bash <(curl -s https://codecov.io/bash)
-
-notifications:
-  email:
-    on_success: never

README.md

@@ -3,7 +3,7 @@
 <div>
 
 [![GoDoc](https://godoc.org/github.com/steambap/captcha?status.svg)](https://godoc.org/github.com/steambap/captcha)
-[![Build Status](https://travis-ci.org/steambap/captcha.svg)](https://travis-ci.org/steambap/captcha)
+[![Build Status](https://github.com/steambap/captcha/workflows/CI/badge.svg)](https://github.com/steambap/captcha/actions?workflow=CI)
 [![codecov](https://codecov.io/gh/steambap/captcha/branch/master/graph/badge.svg)](https://codecov.io/gh/steambap/captcha)
 [![Go Report Card](https://goreportcard.com/badge/github.com/steambap/captcha)](https://goreportcard.com/report/github.com/steambap/captcha)