Bump regex from 2026.5.9 to 2026.8.31

[dependabot]

Bumps regex from 2026.5.9 to 2026.8.31.

Changelog

Sourced from regex's changelog.

Version: 2026.9.3

New version of cibuildwheel no longer supports building for free-threaded Python 3.13.

Version: 2026.9.2

New version of cibuildwheel no longer needs nor supports cpython-freethreading option.

Version: 2026.9.1

Updated cibuildwheel.
Support Python 3.15.

Version: 2026.8.31

Fixed version.

Version: 2026.8.30

Git issue 611: Heap out-of-bounds write at compile time
Git issue 612: count_one() size underflow through the stale required-string cache
Git issue 613: (*SKIP) inside an atomic group, plus an equality-only scan stop
Git issue 614: build_GROUP() does not propagate the match direction

Version: 2026.8.12

Support Python 3.15.

Version: 2026.7.19

Git issue 607: SIGSEGV: NULL pointer dereference in `basic_match()` when `(?R)`/`(?0)` recursion is used inside a fuzzy-matching quantifier
Git issue 608: SIGSEGV: out-of-bounds read in `bytes1_char_at()` with `DOTALL` + a fuzzy constraint + `(?r)` reverse-direction matching

Version: 2026.7.10

Clarified that the POSIX flag makes it look for only the longest overall match.
Git issue 606: regex's compiled-pattern cache eviction is not free-threading-safe

Version: 2026.6.28

Git issue 604: regex fails on free-threading python because setlocale is not thread-safe

Version: 2026.5.9

Reverse matching with full unicode casefolding could lead to out-of-range string indexes.

Version: 2026.4.4

A fix for older Python versions before free-threading was  supported.

... (truncated)

Commits

• b283bb2 Updated version.
• 5268ae7 Python 3.15 not released yet
• 9398a6d Git issue 614: build_GROUP() does not propagate the match direction
• b77694a Git issue 613: (*SKIP) inside an atomic group, plus an equality-only scan stop
• 8244055 Git issue 612: count_one() size underflow through the stale required-string c...
• 1c90270 Git issue 611: Heap out-of-bounds write at compile time
• 1760a20 Support Python 3.15.
• 0525aff Git issue 608: SIGSEGV: out-of-bounds read in bytes1_char_at() with `DOTALL...
• 07dfa3b Git issue 607: SIGSEGV: NULL pointer dereference in basic_match() when `(?R...
• e7716da Python 3.15 not released yet.
• Additional commits viewable in compare view

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[dependabot]

Superseded by #170.