fix: requirements.txt to reduce vulnerabilities

The following vulnerabilities are fixed by pinning transitive dependencies:
- https://snyk.io/vuln/SNYK-PYTHON-CERTIFI-7430173
- https://snyk.io/vuln/SNYK-PYTHON-REQUESTS-6928867
- https://snyk.io/vuln/SNYK-PYTHON-TORNADO-5537286
- https://snyk.io/vuln/SNYK-PYTHON-TORNADO-5840803
- https://snyk.io/vuln/SNYK-PYTHON-TORNADO-6041512
- https://snyk.io/vuln/SNYK-PYTHON-TORNADO-7217828
- https://snyk.io/vuln/SNYK-PYTHON-TORNADO-7217829
- https://snyk.io/vuln/SNYK-PYTHON-URLLIB3-7267250
- https://snyk.io/vuln/SNYK-PYTHON-VALIDATORS-6008990
- https://snyk.io/vuln/SNYK-PYTHON-ZIPP-7430899

requirements.txt

@@ -3,7 +3,7 @@ babelfish==0.6.0
 beautifulsoup4==4.12.3
 bencode.py==4.0.0
 CacheControl==0.13.1
-certifi==2023.7.22
+certifi==2024.7.4
 cloudscraper==1.2.70
 configobj==5.0.8
 contextlib2==21.6.0
@@ -28,15 +28,16 @@ pytimeparse @ https://codeload.github.com/pymedusa/pytimeparse/tar.gz/8f28325972
 pytrakt==3.4.23
 rarfile==3.1
 rebulk==3.2.0
-requests==2.31.0
+requests==2.32.2
 requests-oauthlib==1.3.1
 requests-toolbelt==1.0.0
 six==1.16.0
 subliminal==2.1.0
 tmdbsimple==2.9.1
-tornado==6.1
+tornado==6.4.1
 tornroutes==0.5.1
 ttl-cache==1.6
 tvdbapiv2 @ https://codeload.github.com/pymedusa/tvdbv2/tar.gz/d6d0e9d98071c2d646beb997b336edbb0e98dfb7
-urllib3==1.26.18
-validators==0.20.0
+urllib3==1.26.19
+validators==0.21.0
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability