Update README.md

Author: elect86

README.md

@@ -6,3 +6,8 @@ Unsigned operators and boxed types (Ubyte, Uint, Ulong and Ushort) for unsigned
 
 
 Don't hesitate to contribute to the project by submitting [issues](https://github.com/kotlin-graphics/kotlin-unsigned/issues) or [pull requests](https://github.com/kotlin-graphics/kotlin-unsigned/pulls) for bugs and features. Any feedback is welcome at [elect86@gmail.com](mailto://elect86@gmail.com).
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+Credits:
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+- inspired by [jOOU](https://github.com/jOOQ/jOOU)