fix: requirements.dev.txt to reduce vulnerabilities

The following vulnerabilities are fixed by pinning transitive dependencies:
- https://snyk.io/vuln/SNYK-PYTHON-AIOHTTP-6091621
- https://snyk.io/vuln/SNYK-PYTHON-AIOHTTP-6091622
- https://snyk.io/vuln/SNYK-PYTHON-AIOHTTP-6209406
- https://snyk.io/vuln/SNYK-PYTHON-AIOHTTP-6209407
- https://snyk.io/vuln/SNYK-PYTHON-AIOHTTP-6645291
- https://snyk.io/vuln/SNYK-PYTHON-AIOHTTP-6808823
- https://snyk.io/vuln/SNYK-PYTHON-AIOHTTP-7675597
- https://snyk.io/vuln/SNYK-PYTHON-PROXYPY-1058919
- https://snyk.io/vuln/SNYK-PYTHON-PYJWT-2840625
- https://snyk.io/vuln/SNYK-PYTHON-ZIPP-7430899

requirements.dev.txt

@@ -1,5 +1,7 @@
 -r requirements.txt
 pytest-aiohttp==0.3.0
 pytest==6.2.0
-proxy.py==2.2.0
-pyjwt==1.7.1
+proxy.py==2.3.1
+pyjwt==2.4.0
+aiohttp>=3.10.2 # not directly required, pinned by Snyk to avoid a vulnerability
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability