build(deps): bump ecdsa from 0.18.0 to 0.19.0

Bumps [ecdsa](https://github.com/tlsfuzzer/python-ecdsa) from 0.18.0 to 0.19.0.
- [Release notes](https://github.com/tlsfuzzer/python-ecdsa/releases)
- [Changelog](https://github.com/tlsfuzzer/python-ecdsa/blob/master/NEWS)
- [Commits](tlsfuzzer/python-ecdsa@python-ecdsa-0.18.0...python-ecdsa-0.19.0)

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

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

requirements.txt

@@ -26,7 +26,7 @@ click==8.1.7
 colorama==0.4.6
 dag-cbor==0.3.3
 domain2idna==1.12.0
-ecdsa==0.18.0
+ecdsa==0.19.0
 Flask==3.0.3
 Flask-Caching==2.1.0
 flask-gae-static==1.0