chore(deps): update numpy requirement from ~=1.19.4 to ~=1.21.1

[dependabot-preview[bot]]

Updates the requirements on numpy to permit the latest version.

Release notes

Sourced from numpy's releases.

v1.21.1

NumPy 1.21.1 Release Notes

The NumPy 1.21.1 is maintenance release that fixes bugs discovered after the 1.21.0 release and updates OpenBLAS to v0.3.17 to deal with problems on arm64.

The Python versions supported for this release are 3.7-3.9. The 1.21.x series is compatible with development Python 3.10. Python 3.10 will be officially supported after it is released.

:warning: There are unresolved problems compiling NumPy 1.20.0 with gcc-11.1.

• Optimization level -O3 results in many incorrect warnings when running the tests.
• On some hardware NumPY will hang in an infinite loop.

Contributors

A total of 11 people contributed to this release. People with a "+" by their names contributed a patch for the first time.

• Bas van Beek
• Charles Harris
• Ganesh Kathiresan
• Gregory R. Lee
• Hugo Defois +
• Kevin Sheppard
• Matti Picus
• Ralf Gommers
• Sayed Adel
• Sebastian Berg
• Thomas J. Fan

Pull requests merged

A total of 26 pull requests were merged for this release.

• #19311: REV,BUG: Replace NotImplemented with typing.Any
• #19324: MAINT: Fixed the return-dtype of ndarray.real and imag
• #19330: MAINT: Replace "dtype[Any]" with dtype in the definiton of...
• #19342: DOC: Fix some docstrings that crash pdf generation.
• #19343: MAINT: bump scipy-mathjax
• #19347: BUG: Fix arr.flat.index for large arrays and big-endian machines
• #19348: ENH: add numpy.f2py.get_include function
• #19349: BUG: Fix reference count leak in ufunc dtype handling

... (truncated)

Commits

• df6d260 Merge pull request #19510 from charris/prepare-1.21.1-release
• 7031a82 REL: Prepare for NumPy 1.21.1 release.
• 7b27ba9 Merge pull request #19503 from charris/backport-19468
• cadd4ba DOC: Document that size_t is not guaranteed to map to np.intp under rare ...
• 374440e TST: Update the dtype typing tests
• 648110f MAINT: Add a missing object overload to np.dtype
• 8cd3546 MAINT: Add ctypes overloads to np.dtype
• 8f07655 Merge pull request #19502 from charris/backport-19446
• 4c80d18 Merge pull request #19501 from charris/backport-19456
• 74f82c9 Merge pull request #19500 from charris/backport-19396
• Additional commits viewable in compare view

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