New name for library and base package

[RBusarow]

"DispatcherProvider" isn't a very good name. For the interface, it's nice and descriptive, and a fairly common name for what it does, so I'm okay with leaving that alone.

As a library, though, it feels too descriptive to the point of being limiting. I would like to add functionality to the library with more modules and artifacts, where this new content is related to but definition not core to the functionality of DispatcherProvider.

I've been using the name dispatch as a base package for a few days, and I more or less like it.

The resultant package structure would look something like this:

import	description
dispatch.core.*	Core functionality, naturally
dispatch.core.test.*	core testing functionality
dispatch.extensions.*	essentially ktx for coroutines
dispatch.core.test.android.*	IdlingDispatcher + dispatch.core.test
dispatch.android.* (runtime artifact)	fork of androidx.lifecycle.runtime but more extensible and without the leaky pausing dispatcher
dispatch.android.* (viewModel artifact)	fork of androidx.lifecycle.viewmodel but more extensible