fix: files/requirements_dev.txt to reduce vulnerabilities

The following vulnerabilities are fixed by pinning transitive dependencies:
- https://snyk.io/vuln/SNYK-PYTHON-URLLIB3-10390193
- https://snyk.io/vuln/SNYK-PYTHON-URLLIB3-10390194

Author: snyk-bot

files/requirements_dev.txt

@@ -4,7 +4,7 @@ celery>=5.1.0
 cffi>=1.14.5
 gevent>=21.12.0
 ujson>=1.35
-urllib3>=1.19 # required to avoid issues with get_url module
+urllib3>=2.5.0 # required to avoid issues with get_url module
 # - ndg-httpsclient>=0.4.2 # required to avoid issues with get_url module
 pyasn1==0.4.8
 #- six>=1.10.0  # try to fix error in dependencies with requests[security]