docs: enhanced contributing section (patw0929#356)

* Updated Contributions

* Update README.md

* Update README.md

Author: Anoop01234

README.md

@@ -68,13 +68,17 @@ You can prepare a distribution build using `yarn run build`.
 
 ## Contributing
 
+Any kind of contribution including proposals, doc improvements, enhancements, bug fixes are always welcome. 
+
 To contribute to react-intl-tel-input, clone this repo locally and commit your code on a separate branch. Please write tests for your code, and run the linter before opening a pull-request:
 
 ```
 yarn test
 yarn run lint
 ```
 
+Also, please let us know if you encounter any issue by filing an [issue](https://github.com/patw0929/react-intl-tel-input/issues).
+
 ## Inspired by
 
 [International Telephone Input](https://github.com/jackocnr/intl-tel-input) - [@jackocnr](https://github.com/jackocnr)