Suggest yarn create instead of a global package

Solves the problem of user having an incompatible or outdated version of `create-react-app` installed. Also, it's arguably more convenient this way.

Author: Dominik Rowicki

README.md

@@ -17,8 +17,7 @@ The idea behind this project is to provide a solid foundation for **Single Page
 
 ## Usage
 ```sh
-yarn global add create-react-app
-create-react-app project-name --scripts-version @netguru/react-scripts
+yarn create react-app project-name --scripts-version @netguru/react-scripts
 ```
 
 ## Create React App should not expose any configs, why there is a stylelint and eslint config present?