fix: api/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-FLASK-5490129
- https://snyk.io/vuln/SNYK-PYTHON-JINJA2-1012994
- https://snyk.io/vuln/SNYK-PYTHON-JINJA2-6150717
- https://snyk.io/vuln/SNYK-PYTHON-PY-1049546
- https://snyk.io/vuln/SNYK-PYTHON-WERKZEUG-3319935
- https://snyk.io/vuln/SNYK-PYTHON-WERKZEUG-3319936
- https://snyk.io/vuln/SNYK-PYTHON-WERKZEUG-6035177

api/requirements.txt

@@ -1,20 +1,20 @@
 appdirs==1.4.3
 attrs==19.3.0
 bcrypt==3.1.7
-black==19.10b0
+black==24.3.0
 blinker==1.4
 cffi==1.14.0
 click==7.1.1
 entrypoints==0.3
 flake8==3.7.9
 flasgger==0.9.4
-Flask==1.1.2
+Flask==2.2.5
 Flask-Cors==3.0.8
 flask-mongoengine==0.9.5
 Flask-WTF==0.14.3
 importlib-metadata==1.6.0
 itsdangerous==1.1.0
-Jinja2==2.11.2
+Jinja2==3.1.3
 jsonschema==3.2.0
 loguru==0.4.1
 MarkupSafe==1.1.1
@@ -25,7 +25,7 @@ more-itertools==8.2.0
 packaging==20.3
 pathspec==0.8.0
 pluggy==0.13.1
-py==1.8.1
+py==1.10.0
 pycodestyle==2.5.0
 pycparser==2.20
 pyflakes==2.1.1
@@ -41,6 +41,6 @@ six==1.14.0
 toml==0.10.0
 typed-ast==1.4.1
 wcwidth==0.1.9
-Werkzeug==1.0.1
+Werkzeug==2.3.8
 WTForms==2.3.1
 zipp==3.1.0