This minor release bumps the pinned PyTorch version to v1.7.1, and contains some minor improvements.

Highlights

Python 3.9 support

This releases add native binaries for Python 3.9 #3063

Bugfixes

• Make read_file and write_file accept unicode strings on Windows #2949
• Replaced tuple creation by one acceptable by majority of compilers #2937
• Add docs for focal_loss #2979