fix: requirements.txt to reduce vulnerabilities

The following vulnerabilities are fixed by pinning transitive dependencies:
- https://snyk.io/vuln/SNYK-PYTHON-CRYPTOGRAPHY-6913422
- https://snyk.io/vuln/SNYK-PYTHON-URLLIB3-7267250

Author: snyk-bot

requirements.txt

@@ -3,7 +3,7 @@ certifi==2020.4.5.1
 cffi==1.14.0
 chardet==3.0.4
 click==7.1.1
-cryptography==3.3.2
+cryptography==42.0.8
 idna==2.9
 importlib-metadata==1.6.0
 jeepney==0.4.3
@@ -15,5 +15,5 @@ PyNaCl==1.3.0
 requests==2.23.0
 SecretStorage==3.1.2
 six==1.14.0
-urllib3==1.25.9
+urllib3==1.26.19
 zipp==3.1.0