Bump arrow from 1.3.0 to 1.4.0

Bumps [arrow](https://github.com/arrow-py/arrow) from 1.3.0 to 1.4.0.
- [Release notes](https://github.com/arrow-py/arrow/releases)
- [Changelog](https://github.com/arrow-py/arrow/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/arrow-py/arrow/compare/1.3.0...1.4.0)

---
updated-dependencies:
- dependency-name: arrow
  dependency-version: 1.4.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

requirements.txt

@@ -1,5 +1,5 @@
 accessible_output2 @ git+https://github.com/accessibleapps/accessible_output2@57bda997d98e87dd78aa049e7021cf777871619b
-arrow==1.3.0
+arrow==1.4.0
 attrs==25.4.0
 backports.functools-lru-cache==2.0.0
 blurhash==1.1.5