build(deps): bump regex from 2026.1.15 to 2026.2.19

Bumps [regex](https://github.com/mrabarnett/mrab-regex) from 2026.1.15 to 2026.2.19.
- [Changelog](https://github.com/mrabarnett/mrab-regex/blob/hg/changelog.txt)
- [Commits](mrabarnett/mrab-regex@2026.1.15...2026.2.19)

---
updated-dependencies:
- dependency-name: regex
  dependency-version: 2026.2.19
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

pyproject.toml

@@ -80,7 +80,7 @@ classifiers = [
     "Programming Language :: Python :: 3.14",
 ]
 dependencies = [
-  "regex == 2026.1.15",
+  "regex == 2026.2.19",
   "Deprecated ~= 1.2"
 ]
 dynamic = ["optional-dependencies"]