COMP: Bump pyupgrade v3.19.0 to v3.21.2 for Python 3.14

[hjmjohnson]

Fix pre-commit run -a failure when pixi provides Python 3.14. pyupgrade v3.19.0 crashes with TypeError: cannot use a bytes pattern on a string-like object because Python 3.14 changed tokenize.cookie_re from bytes to str.

Error trace

File "pyupgrade/_main.py", line 297, in _fix_tokens
    tokenize.cookie_re.match(token.src)
TypeError: cannot use a bytes pattern on a string-like object

Fixed upstream in asottile/pyupgrade. v3.21.2 handles both bytes and str cookie_re variants.

[greptile-apps]

Greptile Summary

Bumps pyupgrade from v3.19.0 to v3.21.2 in .pre-commit-config.yaml to fix a TypeError crash introduced by Python 3.14's change of tokenize.cookie_re from bytes to str. No logic, configuration, or behavioral changes beyond the version pin.

Confidence Score: 5/5

Safe to merge — minimal, targeted version bump with no functional changes.

Single-line version pin change with a clear upstream fix and well-documented motivation. No logic, security, or behavioral concerns.

No files require special attention.

Important Files Changed

Filename	Overview
.pre-commit-config.yaml	Bumps pyupgrade from v3.19.0 to v3.21.2 to fix Python 3.14 incompatibility with tokenize.cookie_re

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[pre-commit run] --> B{Python version}
    B -- Python ≤ 3.13 --> C[pyupgrade v3.19.0\nworks fine]
    B -- Python 3.14 --> D[pyupgrade v3.19.0\ncrashes: TypeError\ncookie_re bytes vs str]
    D --> E[Bump to v3.21.2]
    E --> F[pyupgrade v3.21.2\nhandles both bytes\nand str cookie_re]
    F --> G[pre-commit passes]
    C --> G

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