Bump mashumaro from 3.19 to 3.20 (#262)

Bumps [mashumaro](https://github.com/Fatal1ty/mashumaro) from 3.19 to 3.20.
- [Release notes](https://github.com/Fatal1ty/mashumaro/releases)
- [Commits](Fatal1ty/mashumaro@v3.19...v3.20)

---
updated-dependencies:
- dependency-name: mashumaro
  dependency-version: '3.20'
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

pyproject.toml

@@ -24,7 +24,7 @@ version = "0.0.0"
 dev = [
     # Production requirements
     "aiohttp==3.13.3",
-    "mashumaro==3.19",
+    "mashumaro==3.20",
     "orjson==3.11.7",
 
     # Test requirements