Add contributors (#188)

* Update README.md

Author: smilechenbiao

README.md

@@ -183,12 +183,13 @@ Open the `build.gradle` in IntelliJ, open "Gradle" tool window, expand the proje
 * Share to others to help more people have a better develope expierience :heart:
 
 ### Authors
-* [wuseal](https://github.com/wuseal)
-* [kezhenxu94](https://github.com/kezhenxu94)
+* This project exists thanks to all the people who contribute.
+
+<a href="https://github.com/wuseal/JsonToKotlinClass/graphs/contributors"><img src="https://opencollective.com/jsontokotlin/contributors.svg?width=890" /></a>
 
 ### Acknowledgement
 
-The development of this plugin is powerly driven by JetBrains.
+* The development of this plugin is powerly driven by JetBrains.
 
 ### Join the Community