Upgrade flask (#17)

* Bump werkzeug from 2.2.2 to 3.0.0 in /backend

Bumps [werkzeug](https://github.com/pallets/werkzeug) from 2.2.2 to 3.0.0.
- [Release notes](https://github.com/pallets/werkzeug/releases)
- [Changelog](https://github.com/pallets/werkzeug/blob/main/CHANGES.rst)
- [Commits](pallets/werkzeug@2.2.2...3.0.0)

---
updated-dependencies:
- dependency-name: werkzeug
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

* Bump flask-cors from 3.0.10 to 4.0.0 in /backend

Bumps [flask-cors](https://github.com/corydolphin/flask-cors) from 3.0.10 to 4.0.0.
- [Release notes](https://github.com/corydolphin/flask-cors/releases)
- [Changelog](https://github.com/corydolphin/flask-cors/blob/main/CHANGELOG.md)
- [Commits](corydolphin/flask-cors@3.0.10...4.0.0)

---
updated-dependencies:
- dependency-name: flask-cors
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

* Bump flask from 2.2.2 to 3.0.0 in /backend

Bumps [flask](https://github.com/pallets/flask) from 2.2.2 to 3.0.0.
- [Release notes](https://github.com/pallets/flask/releases)
- [Changelog](https://github.com/pallets/flask/blob/main/CHANGES.rst)
- [Commits](pallets/flask@2.2.2...3.0.0)

---
updated-dependencies:
- dependency-name: flask
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

---------

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

backend/requirements.txt

@@ -2,8 +2,8 @@ astroid==3.0.0
 black==23.9.1
 click==8.1.7
 dill==0.3.7
-Flask==2.2.2
-Flask-Cors==3.0.10
+Flask==3.0.0
+Flask-Cors==4.0.0
 gunicorn==20.1.0
 iniconfig==2.0.0
 isort==5.12.0
@@ -20,4 +20,4 @@ pylint==3.0.1
 pytest==7.4.2
 six==1.16.0
 tomlkit==0.12.1
-Werkzeug==2.2.2
+Werkzeug==3.0.0