build(deps): bump ecdsa from 0.17.0 to 0.18.0

Bumps [ecdsa](https://github.com/tlsfuzzer/python-ecdsa) from 0.17.0 to 0.18.0.
- [Release notes](https://github.com/tlsfuzzer/python-ecdsa/releases)
- [Changelog](https://github.com/tlsfuzzer/python-ecdsa/blob/master/NEWS)
- [Commits](https://github.com/tlsfuzzer/python-ecdsa/compare/python-ecdsa-0.17.0...python-ecdsa-0.18.0)

---
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

@@ -13,7 +13,7 @@ click==8.1.3
 colorama==0.4.5
 Deprecated==1.2.13
 domain2idna==1.12.0
-ecdsa==0.17.0
+ecdsa==0.18.0
 extras==1.0.0
 feedgen==0.9.0
 feedparser==6.0.10