build(deps): bump ccxt from 4.2.18 to 4.2.20

Bumps [ccxt](https://github.com/ccxt/ccxt) from 4.2.18 to 4.2.20.
- [Release notes](https://github.com/ccxt/ccxt/releases)
- [Changelog](https://github.com/ccxt/ccxt/blob/master/CHANGELOG.md)
- [Commits](ccxt/ccxt@4.2.18...4.2.20)

---
updated-dependencies:
- dependency-name: ccxt
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements_with_versions.txt

@@ -81,7 +81,7 @@ Unidecode==1.3.8
 Ball==0.2.9
 pynput==1.7.6
 gTTS==2.5.0
-ccxt==4.2.18
+ccxt==4.2.20
 fitz==0.0.1.dev2
 fastapi==0.109.0
 Django==5.0.1