v1.2.0

Added

• Added type-hinting across the code base as well as some doc-strings.

Changed

• A heavy warning discouraging the use of your CPU as a PyTorch device was added. Ability to use
  your CPU was hidden but reading the warning explains how to do so.
• Reduced required VapourSynth version to 48 or newer.

Removed

• Remove the conversion to RGB prior to model execution. RGB is required for the Model, but let
  the user decide how to convert to format, what algorithm, how to deal with matrix, and so on.
• Removed setuptools from dependencies.

Fixed

• Add a check to ensure input clip is RGB, since auto conversion was removed.
• Add missing documentation on [1.1.0]'s changes to scale and such.