docs(README): fix Travis reference for new owner (#4)

Author: AndersDJohnson

README.md

@@ -1,7 +1,7 @@
 # conventional-commit-types
 
 [![npm](https://img.shields.io/npm/v/conventional-commit-types.svg?maxAge=2592000)](https://www.npmjs.com/package/conventional-commit-types)
-[![Build Status](https://img.shields.io/travis/AndersDJohnson/conventional-commit-types.svg?maxAge=2592000)](https://travis-ci.org/AndersDJohnson/conventional-commit-types)
+[![Build Status](https://img.shields.io/travis/commitizen/conventional-commit-types.svg?maxAge=2592000)](https://travis-ci.org/commitizen/conventional-commit-types)
 
 List of conventional commit types.