fix: requirements.txt to reduce vulnerabilities

The following vulnerabilities are fixed by pinning transitive dependencies:
- https://snyk.io/vuln/SNYK-PYTHON-BLACK-6256273
- https://snyk.io/vuln/SNYK-PYTHON-ZIPP-7430899

Author: snyk-bot

requirements.txt

@@ -1,6 +1,6 @@
 # required
 h3==3.7.2
-black==21.5b1
+black==24.3.0
 PyYAML==5.4.1
 
 # fake data providers supported
@@ -13,3 +13,4 @@ pytest==6.2.4
 pytest-watch==4.2.0
 pytest-sugar==0.9.4
 pytest-cov==2.12.0
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability