Update version

Author: pinventado

README.md

@@ -2,5 +2,6 @@
 
 [![gtest-extension v0.1-beta](https://img.shields.io/badge/gtest--extension-v0.1--beta-brightgreen.svg)](https://github.com/ILXL/gtest-extension)
 
-**Current version**: v0.2-beta
+**Current version**: v0.3-beta
+
 **Availability**: Linux