chore: update CI badge from travis to github CI (rollbar#906)

Author: waltjones

.github/workflows/ci.yml

@@ -3,6 +3,7 @@ name: Rollbar.js CI
 on:
   push:
     branches: [ master ]
+    tags: [ v* ]
   pull_request:
     branches: [ master ]
 

Gruntfile.js

@@ -190,7 +190,7 @@ module.exports = function(grunt) {
           },
           // README travis link
           {
-            from: new RegExp('(https://travis-ci\.org/rollbar/rollbar\.js\.svg\\?branch=v)([0-9a-zA-Z.-]+)'),
+            from: new RegExp('(https://github\\.com/rollbar/rollbar\\.js/workflows/Rollbar\\.js%20CI/badge\\.svg\\?branch=v)([0-9a-zA-Z.-]+)'),
             to: function(match, index, fullText, captures) {
               captures[1] = pkg.version;
               return captures.join('');

README.md

@@ -1,7 +1,7 @@
 # Rollbar.js
 
 
-[![Build Status](https://travis-ci.org/rollbar/rollbar.js.svg?branch=v2.19.4)](https://travis-ci.org/rollbar/rollbar.js)
+![Build Status](https://github.com/rollbar/rollbar.js/workflows/Rollbar.js%20CI/badge.svg?branch=v2.19.4)
 [![Code Quality: Javascript](https://img.shields.io/lgtm/grade/javascript/g/rollbar/rollbar.js.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/rollbar/rollbar.js/context:javascript)
 [![Total Alerts](https://img.shields.io/lgtm/alerts/g/rollbar/rollbar.js.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/rollbar/rollbar.js/alerts)
 
@@ -15,7 +15,7 @@ Rollbar.js is the Javascript SDK for [Rollbar](https://rollbar.com).  It support
 ## Usage and Reference
 
 For complete usage instructions and configuration reference, see our [Javascript SDK docs](https://docs.rollbar.com/docs/javascript).
-  
+
 ## Release History & Changelog
 
 See our [Releases](https://github.com/rollbar/rollbar.js/releases) page for a list of all releases, including changes.