Bump fastjsonschema from 2.19.1 to 2.20.0 in /src (#136)

Bumps [fastjsonschema](https://github.com/horejsek/python-fastjsonschema) from 2.19.1 to 2.20.0.
- [Changelog](https://github.com/horejsek/python-fastjsonschema/blob/master/CHANGELOG.txt)
- [Commits](horejsek/python-fastjsonschema@v2.19.1...v2.20.0)

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

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

src/requirements.txt

@@ -8,7 +8,7 @@ attrs==23.2.0
     # via
     #   jsonschema
     #   referencing
-fastjsonschema==2.19.1
+fastjsonschema==2.20.0
     # via -r requirements.in
 genson==1.3.0
     # via -r requirements.in