Update README.md

Author: junedomingo

README.md

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 # React Starterkit
 > Build web apps using ReactJS, Redux, Webpack and Babel
 
+<a target='_blank' rel='nofollow' href='https://app.codesponsor.io/link/rLaZTxWeQsGAsDnqWnPDEK7u/junedomingo/react-starterkit'>
+  <img alt='Sponsor' width='888' height='68' src='https://app.codesponsor.io/embed/rLaZTxWeQsGAsDnqWnPDEK7u/junedomingo/react-starterkit.svg' />
+</a>
+
 ### Tech
 - [Redux](http://redux.js.org/) - Predictable state container for JavaScript apps
 - [Webpack](https://webpack.github.io/) - A bundler for javascript and friends