chore(deps): bump python-rapidjson from 1.18 to 1.19

Bumps [python-rapidjson](https://github.com/python-rapidjson/python-rapidjson) from 1.18 to 1.19.
- [Changelog](https://github.com/python-rapidjson/python-rapidjson/blob/master/CHANGES.rst)
- [Commits](https://github.com/python-rapidjson/python-rapidjson/compare/v1.18...v1.19)

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

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

ft_client/requirements.txt

@@ -1,3 +1,3 @@
 # Requirements for freqtrade client library
 requests==2.32.3
-python-rapidjson==1.18
+python-rapidjson==1.19

requirements.txt

@@ -30,7 +30,7 @@ pyarrow==17.0.0; platform_machine != 'armv7l'
 py_find_1st==1.1.6
 
 # Load ticker files 30% faster
-python-rapidjson==1.18
+python-rapidjson==1.19
 # Properly format api responses
 orjson==3.10.6