Merge pull request #28 from NthPortal/semver-badge

Add badge for versioning type

README.md

@@ -4,6 +4,7 @@ A framework for creating shells/CLIs for an application
 [![Build Status](https://travis-ci.org/NthPortal/app-shell.svg?branch=master)](https://travis-ci.org/NthPortal/app-shell)
 [![Coverage Status](https://coveralls.io/repos/github/NthPortal/app-shell/badge.svg?branch=master)](https://coveralls.io/github/NthPortal/app-shell?branch=master)
 [![Maven Central](https://img.shields.io/maven-central/v/com.nthportal/app-shell_2.12.svg)](https://mvnrepository.com/artifact/com.nthportal/app-shell_2.12)
+[![Versioning](https://img.shields.io/badge/versioning-semver%202.0.0-blue.svg)](http://semver.org/spec/v2.0.0.html)
 
 ## Add as a Dependency