v8.0.9: Support for NVTX ranges and mypy plugin fixes

✨ New features and improvements

• Add ops registry.
• Enable config overrides to add new keys.
• Allow newer releases of nbconvert and nbformat.
• Layer for marking NVTX ranges.
• Support mixed-precision training in the PyTorch shim (experimental).

🔴 Bug fixes

• Fix issue #521: Fix numpy_ops gemm output.
• Fix issue #525: Fix mypy plugin crash on variadic arguments.

👥 Contributors

@adrianeboyd, @connorbrinton, @danieldk, @honnibal, @ines, @svlandeg