Error:Execution failed for task ':app:processDebugManifest'.
Manifest merger failed : uses-sdk:minSdkVersion 16 cannot be smaller than version 21 declared in library [com.hlab.fabrevealmenu:fab-reveal-menu:1.0.4] D:\gradle\caches\transforms-1\files-1.1\fab-reveal-menu-1.0.4.aar\cfbe3134ff7dab05e863daea447b358f\AndroidManifest.xml as the library might be using APIs not available in 16
Suggestion: use a compatible library with a minSdk of at most 16,
or increase this project's minSdk version to at least 21,
or use tools:overrideLibrary="com.hlab.fabrevealmenu" to force usage (may lead to runtime failures)
It should be 18 atleast
Error:Execution failed for task ':app:processDebugManifest'.