Cleanup Continuous Integration (#384)

* Remove "stale" workflow. It was a nice idea, but deactivated for quite some time anyway

* Remove TravisCI

.github/workflows/stale.yml

@@ -1,19 +0,0 @@
-name: "Close stale issues"
-on:
-  schedule:
-  - cron: "0 4 * * *"
-
-jobs:
-  stale:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/stale@v1.1.0
-      with:
-        repo-token: ${{ secrets.GITHUB_TOKEN }}
-        stale-issue-message: >
-          This issue has been automatically marked as stale because it has not had
-          recent activity in the last 60 days. It will be closed in 7 days if no further activity occurs.
-          Thank you for your contributions.
-        days-before-stale: 9999
-        days-before-close: 9999
-        stale-issue-label: stale

.travis.yml

@@ -1,14 +0,0 @@
-language: go
-
-sudo: false
-
-go:
-  - "1.13.x"
-  - "1.14.x"
-  - "1.15.x"
-
-before_install:
-  - go get -t ./...
-
-script:
-  - GOMAXPROCS=4 GORACE="halt_on_error=1" go test -race -v ./...

README.md

@@ -1,7 +1,7 @@
 # go-jira
 
 [![GoDoc](https://godoc.org/github.com/andygrunwald/go-jira?status.svg)](https://godoc.org/github.com/andygrunwald/go-jira)
-[![Build Status](https://travis-ci.org/andygrunwald/go-jira.svg?branch=master)](https://travis-ci.org/andygrunwald/go-jira)
+[![Build Status](https://github.com/andygrunwald/go-jira/actions/workflows/testing.yml/badge.svg)](https://github.com/andygrunwald/go-jira/actions/workflows/testing.yml)
 [![Go Report Card](https://goreportcard.com/badge/github.com/andygrunwald/go-jira)](https://goreportcard.com/report/github.com/andygrunwald/go-jira)
 
 [Go](https://golang.org/) client library for [Atlassian Jira](https://www.atlassian.com/software/jira).