Update dependencies

Upgrade dependencies

Upgrade dependencies

Introduce a new setCallback method which can be used to pass higher o…

…rder functions.

Also, convert MainActivity java class to Kotlin class.

Changes to gradle for a successful jitpack build.

Prepare for 1.0.1.

Update install section.

Prepare for 0.5.6.

Prepare for 0.5.5

Prepare for 0.5.4.