itsdangerous: update to version 2.1.2

itsdangerous: update to version 2.1.2

Version 2.1.2
Released 2022-03-24

  Handle date overflow in timed unsign on 32-bit systems.
  pallets/itsdangerous#299

Version 2.1.1
Released 2022-03-09

  Handle date overflow in timed unsign. pallets/itsdangerous#296

Version 2.1.0
Released 2022-02-17

  Drop support for Python 3.6. pallets/itsdangerous#272

  Remove previously deprecated code. pallets/itsdangerous#273

  JWS functionality: Use a dedicated library such as Authlib instead.

  import itsdangerous.json: Import json from the standard library instead.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>