Update Auth0.Android dependency (#652)

Author: poovamraj

lib/build.gradle

@@ -71,7 +71,7 @@ dependencies {
     implementation 'com.google.android.material:material:1.4.0'
     implementation 'com.google.code.gson:gson:2.8.9'
     implementation 'com.squareup:otto:1.3.8'
-    api 'com.auth0.android:auth0:2.8.0'
+    api 'com.auth0.android:auth0:2.8.1'
     testImplementation 'junit:junit:4.13.2'
     testImplementation 'org.hamcrest:hamcrest-library:2.2'
     testImplementation 'org.robolectric:robolectric:4.4'