Added backers and sponsors on the README

Author: monkeywithacupcake

README.md

@@ -1,6 +1,6 @@
 # How to Implement Collapsible Table Section in iOS
 
-[![Language](https://img.shields.io/badge/swift-3.0-brightgreen.svg?style=flat)]()
+[![Backers on Open Collective](https://opencollective.com/ios-swift-collapsible-table-section/backers/badge.svg)](#backers) [![Sponsors on Open Collective](https://opencollective.com/ios-swift-collapsible-table-section/sponsors/badge.svg)](#sponsors) [![Language](https://img.shields.io/badge/swift-3.0-brightgreen.svg?style=flat)]()
 
 A simple iOS swift project demonstrates how to implement collapsible table section programmatically, that is no main storyboard, no XIB, no need to register nib, just pure Swift!
 
@@ -225,6 +225,36 @@ Sometimes you might want to implement the collapsible cells in a grouped-style t
   <img alt="But Me a Coffee" src="https://az743702.vo.msecnd.net/cdn/kofi4.png?v=0" width="200" />
 </a>
 
+## Contributors
+
+This project exists thanks to all the people who contribute. [[Contribute](CONTRIBUTING.md)].
+<a href="graphs/contributors"><img src="https://opencollective.com/ios-swift-collapsible-table-section/contributors.svg?width=890" /></a>
+
+
+## Backers
+
+Thank you to all our backers! 🙏 [[Become a backer](https://opencollective.com/ios-swift-collapsible-table-section#backer)]
+
+<a href="https://opencollective.com/ios-swift-collapsible-table-section#backers" target="_blank"><img src="https://opencollective.com/ios-swift-collapsible-table-section/backers.svg?width=890"></a>
+
+
+## Sponsors
+
+Support this project by becoming a sponsor. Your logo will show up here with a link to your website. [[Become a sponsor](https://opencollective.com/ios-swift-collapsible-table-section#sponsor)]
+
+<a href="https://opencollective.com/ios-swift-collapsible-table-section/sponsor/0/website" target="_blank"><img src="https://opencollective.com/ios-swift-collapsible-table-section/sponsor/0/avatar.svg"></a>
+<a href="https://opencollective.com/ios-swift-collapsible-table-section/sponsor/1/website" target="_blank"><img src="https://opencollective.com/ios-swift-collapsible-table-section/sponsor/1/avatar.svg"></a>
+<a href="https://opencollective.com/ios-swift-collapsible-table-section/sponsor/2/website" target="_blank"><img src="https://opencollective.com/ios-swift-collapsible-table-section/sponsor/2/avatar.svg"></a>
+<a href="https://opencollective.com/ios-swift-collapsible-table-section/sponsor/3/website" target="_blank"><img src="https://opencollective.com/ios-swift-collapsible-table-section/sponsor/3/avatar.svg"></a>
+<a href="https://opencollective.com/ios-swift-collapsible-table-section/sponsor/4/website" target="_blank"><img src="https://opencollective.com/ios-swift-collapsible-table-section/sponsor/4/avatar.svg"></a>
+<a href="https://opencollective.com/ios-swift-collapsible-table-section/sponsor/5/website" target="_blank"><img src="https://opencollective.com/ios-swift-collapsible-table-section/sponsor/5/avatar.svg"></a>
+<a href="https://opencollective.com/ios-swift-collapsible-table-section/sponsor/6/website" target="_blank"><img src="https://opencollective.com/ios-swift-collapsible-table-section/sponsor/6/avatar.svg"></a>
+<a href="https://opencollective.com/ios-swift-collapsible-table-section/sponsor/7/website" target="_blank"><img src="https://opencollective.com/ios-swift-collapsible-table-section/sponsor/7/avatar.svg"></a>
+<a href="https://opencollective.com/ios-swift-collapsible-table-section/sponsor/8/website" target="_blank"><img src="https://opencollective.com/ios-swift-collapsible-table-section/sponsor/8/avatar.svg"></a>
+<a href="https://opencollective.com/ios-swift-collapsible-table-section/sponsor/9/website" target="_blank"><img src="https://opencollective.com/ios-swift-collapsible-table-section/sponsor/9/avatar.svg"></a>
+
+
+
 ## License ##
 
 MIT License