Bump pycryptodomex from 3.7.3 to 3.19.1

Bumps [pycryptodomex](https://github.com/Legrandin/pycryptodome) from 3.7.3 to 3.19.1.
- [Release notes](https://github.com/Legrandin/pycryptodome/releases)
- [Changelog](https://github.com/Legrandin/pycryptodome/blob/master/Changelog.rst)
- [Commits](Legrandin/pycryptodome@v3.7.3...v3.19.1)

---
updated-dependencies:
- dependency-name: pycryptodomex
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements_dev.txt

@@ -4,7 +4,7 @@ twine>=1.12.1
 wheel>=0.32.1
 
 # fixed version of pycryptodomex so pyup bot can send PR's on updates
-pycryptodomex==3.7.3
+pycryptodomex==3.19.1
 
 # documentation dependencies
 Sphinx>=1.8.1