README.md in grape-jwt-authentication-1.1.0 vs README.md in grape-jwt-authentication-1.2.0

- old
+ new

@@ -1,5 +1,5 @@
-![grape-jwt-authentication](doc/assets/project.png)
+![grape-jwt-authentication](doc/assets/project.svg)
 
 [![Build Status](https://travis-ci.org/hausgold/grape-jwt-authentication.svg?branch=master)](https://travis-ci.org/hausgold/grape-jwt-authentication)
 [![Gem Version](https://badge.fury.io/rb/grape-jwt-authentication.svg)](https://badge.fury.io/rb/grape-jwt-authentication)
 [![Maintainability](https://api.codeclimate.com/v1/badges/446f3eff18bebff9c174/maintainability)](https://codeclimate.com/github/hausgold/grape-jwt-authentication/maintainability)
 [![Test Coverage](https://api.codeclimate.com/v1/badges/446f3eff18bebff9c174/test_coverage)](https://codeclimate.com/github/hausgold/grape-jwt-authentication/test_coverage)