Extract ViewPumpContextWrapper from the library

Instead of internal ViewPumpContextWrapper usage - extract it to be used in lambda argument as follows:

    private val delegateHolder = PhilologyAppCompatDelegateHolder()
    override fun getDelegate() = delegateHolder.getDelegate(super.getDelegate()) {
        ViewPumpContextWrapper.wrap(Philology.wrap(it))
    }

Add support for AppCompat ver. 1.2.0

Increased AppCompat version to 1.2.0 and adjusted the context wrapping based on the latest AppCompat changes.