prepare for 2.0.0 release

[Canato]

Description:

New release 2.0.0

Changed

• AsyncTask to Kotlin Coroutines #9

Fixed

• Uri for camera capture option is now invariant for Android 10 and above #21

Backward compatibility:

With the new version user need to make Java 8 available

• Go to app level build.gradle file

• Add this line inside android in build.gradle

   compileOptions {
       sourceCompatibility JavaVersion.VERSION_1_8
       targetCompatibility JavaVersion.VERSION_1_8
   }