Update pytz verion

[amardeep]

Currently labelstudio depends on pytz==2019.3 This causes issues with other packages for eg. latest version of pandas which requires pytz>=2020.1 or celery which requires pytz>=2021.3

Please update pytz dependency.

To Reproduce

poetry init
poetry add celery pandas label-studio

❯ poetry add celery pandas label-studio
Using version ^5.2.7 for celery
Using version ^1.4.2 for pandas
Using version ^1.4.1 for label-studio

Updating dependencies
Resolving dependencies... (0.7s)

  SolverProblemError

  Because no versions of label-studio match >1.4.1,<1.4.1.post0 || >1.4.1.post0,<1.4.1.post1 || >1.4.1.post1,<2.0.0
   and label-studio (1.4.1) depends on pytz (2019.3), label-studio (>=1.4.1,<1.4.1.post0 || >1.4.1.post0,<1.4.1.post1 || >1.4.1.post1,<2.0.0) requires pytz (2019.3).
  And because label-studio (1.4.1.post0) depends on pytz (2019.3)
   and label-studio (1.4.1.post1) depends on pytz (2019.3), label-studio (>=1.4.1,<2.0.0) requires pytz (2019.3).
  And because pandas (1.4.2) depends on pytz (>=2020.1)
   and no versions of pandas match >1.4.2,<2.0.0, label-studio (>=1.4.1,<2.0.0) is incompatible with pandas (>=1.4.2,<2.0.0).
  So, because test-labelstudio depends on both pandas (^1.4.2) and label-studio (^1.4.1), version solving failed.

Environment (please complete the following information):

• OS: Linux

[makseq]

@amardeep Could you contribute and create a PR with this update? It would be great if you could test label-studio with updated pytz. However please use constraints, e.g. pytz>=2019.3,<=2022.3 or pytz~=2022.3.

[Rami-Ismael]

Is this still an open issues? If not, I have a problem using poetry to local install for label studio. I can make a PR request