Update Python dependencies

[filippomc]

Closes CH-109

Implemented solution: updated requirements.txt

How to test this PR: check that the builds are fine and applications start (look at the test deployment)

Sanity checks:

• [x] The issue is well described: clearly states the problem and the general proposed solution(s)
• [x] From the issue and the current PR it is explicitly stated how to test the current change
• [x] The labels in the issue set the scope and the type of issue (bug, feature, etc.)
• [x] All the automated test checks are passing
• [x] All the linked issues are assigned

Breaking changes (select one):

• [x] The present changes do not change the preexisting api in any way
• [ ] This PR and the issue are tagged as a breaking-change

Possible deployment updates issues (select one):

• [ ] There is no reason why deployments based on CloudHarness may break after the current update
• [x] This PR and the issue are tagged as alert:deployment

Test coverage (select one):

• [x] Tests for the relevant cases are included in this pr
• [ ] The changes included in this pr are out of the current test coverage scope

Documentation (select one):

• [ ] The documentation has been updated to match the current changes
• [ ] The changes included in this PR are out of the current documentation scope

Nice to have (if relevant):

• [ ] Screenshots of the changes
• [ ] Explanatory video/animated gif