Remove TravisCI (#369)

Now that CI is covered by GH Actions, Travis is redundant.
* Remove .travis.yml
* Fix README.md Badges

Author: evanplaice

.travis.yml

@@ -1,8 +1,9 @@
 # JSON Resume Schema
 
-[![Greenkeeper badge](https://badges.greenkeeper.io/jsonresume/resume-schema.svg)](https://greenkeeper.io/)
-
-[![Build Status](https://api.travis-ci.org/jsonresume/resume-schema.svg)](http://travis-ci.org/jsonresume/resume-schema) [![Dependency Status](https://david-dm.org/jsonresume/resume-schema.svg)](https://david-dm.org/jsonresume/resume-schema)
+[![GitHub Releases](https://badgen.net/github/tag/jsonresume/resume-schema)](https://github.com/jsonresume/resume-schema/releases)
+[![NPM Release](https://badgen.net/npm/v/resume-schema)](https://www.npmjs.com/package/resume-schema)
+[![Latest Status](https://github.com/jsonresume/resume-schema/workflows/Latest/badge.svg)](https://github.com/vanillawc/wc-template/actions)
+[![Release Status](https://github.com/jsonresume/resume-schema/workflows/Release/badge.svg)](https://github.com/vanillawc/wc-template/actions)
 
 Standard, Specification, Schema