chore: [pre-commit.ci] pre-commit autoupdate

[pre-commit-ci]

updates:

• github.com/asottile/pyupgrade: v2.23.1 → v2.25.0
• github.com/psf/black: 21.7b0 → 21.8b0

As noted in scikit-hep/hist#276 (comment) there is now a black[jupyter] extra that allows for Black to run on Jupyter notebooks. nbqa-black does this, but Marco Gorelli contributed this functionality to Black so now the black-jupyter hook will be the equivalent hook as running black and nbqa-black.

c.f. scikit-hep/pyhf#1598 for more details / an example

* Update pre-commit hooks:
   - github.com/asottile/pyupgrade: v2.23.1 → v2.25.0
   - github.com/psf/black: 21.7b0 → 21.8b0
* Use black-jupyter pre-commit hook over nbqa-black and remove nbqa-black pre-commit hook from nbQA
   - Use jupyter-black pre-commit hook id from Black
   - black-jupyter will run on Python and pyi files, so it replaces the black hook id as well

[codecov]

Codecov Report

Merging #79 (43049b5) into main (822e187) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main      #79   +/-   ##
=======================================
  Coverage   64.48%   64.48%           
=======================================
  Files           7        7           
  Lines         245      245           
  Branches       42       42           
=======================================
  Hits          158      158           
  Misses         64       64           
  Partials       23       23           

Flag	Coverage Δ
unittests	64.48% <ø> (ø)

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