Manifest merger failed : uses-sdk:minSdkVersion 19 cannot be smaller than version 21 declared in library [com.github.tamsiree.RxTool:RxKit:2.6.2] C:\Users\Neal\.gradle\caches\transforms-2\files-2.1\8477270d027534b1378dfa32e9b289cf\jetified-RxKit-2.6.2\AndroidManifest.xml as the library might be using APIs not available in 19

Suggestion: use a compatible library with a minSdk of at most 19,

or increase this project's minSdk version to at least 21,

or use tools:overrideLibrary="com.tamsiree.rxkit" to force usage (may lead to runtime failures)

完整报错是这一段

我通过百度在mainfest中添加<uses-sdk android:minSdkVersion="21"/>

失败了，老师能讲一下我需要添加哪些吗

还有为问题的根源我自己想的可能是

implementation 'com.github.tamsiree.RxTool:RxFeature:2.6.2'

我这个版本是2.6.2 老师的版本是2.4.1

请问老师我是需要退回到2.4.1吗（我试了，但是好像还是不行）

望解答谢谢