v8.1.1: Use confection, new layers and bugfixes

✨ New features and improvements

• Use confection for configurations (#745).
• Add the Dish activation function and layer (#719).
• Add the with_signpost_interval layer to support layer profiling with macOS Instruments (#711).
• Add remap_ids.v2 layer which allows more types of inputs (#726).
• Extend BLIS support to version 0.9.x (#736).
• Improve performance when gradient scaling is used (#746).
• Improve MaxOut performance by unrolling argmax in maxout (#702).

🔴 Bug fixes

• Fix issue #720: Improve type inference by replacing FloatsType in Ops by a TypeVar.
• Fix issue #739: Fix typing of Ops.asarrayDf methods.
• Fix issue #757: Improve compatibility with supported Tensorflow versions.

👥 Contributors

@adrianeboyd, @cclauss, @danieldk, @honnibal, @ines, @kadarakos, @polm, @rmitsch, @shadeMe