install specific yarn version code example

Example 1: yarn react install

There are two ways where you can initiate a REACT app.. 
1. Using npm : npm init react-app <app_name>
	 example : npm init react-app sampleApp
2. Using yarn : yarn create react-app <app_name>
	 example : yarn create react-app sampleApp

Example 2: yarn change version

yarn policies set-version 1.13.0

Example 3: yarn install specific version

yarn set version <version>