Make warning bold

Author: sergeyshpadyrev

readme.md

@@ -5,7 +5,7 @@
 
 React Native Easy Router is an easy-to-use and performant screen navigation library for React Native
 
-_WARNING_: Versions 2.x.x of this library is already not supported but you can find docs and examples [here](https://github.com/sergeyshpadyrev/react-native-easy-router/tree/v2)
+**WARNING**: _Versions 2.x.x of this library is already not supported but you can find docs and examples [here](https://github.com/sergeyshpadyrev/react-native-easy-router/tree/v2)_
 
 ## Installation