* Revert "Prepare 5.0.0-beta2 release (#7345)" This reverts commit 212b4f784742744b7b238607dcefb23ec9db64d7. * update readme
* update version * update doc * update samples
* fix missing import for file * test in shippable * test retrofit2 fx3 kotlin sample * add pom.xml
* added rx3 support * fix rx3 support * generated samples * updated samples * update samples * changed rxjava3 adapter to the one from squareup * changed dependency of RxJava3CallAdapterFactory Co-authored-by: William Cheng <wing328hk@gmail.com>