2.x migrate to androidx

Step 1.

Add it in your root build.gradle at the end of repositories:

	allprojects {
		repositories {
			...
			maven { url 'https://jitpack.io' }
		}
	}

Step 2.

Add the dependency

	dependencies {
	        implementation 'com.github.liyuzhao:swipebackhelper:v2.0.0'
	}