(Note: this tag doesn't change anything but version, compared to 3.1, so copying the 3.1 description here)
Added Authentication with ID card, Smart ID & Mobile ID.
Also:
* Added pylint.
* Fixed a problem with errors not being handled properly in the SessionViewMixin.
* Changed some EsteidError classes to inherit from InvalidParameters.
* Added deprecation warnings and pragma: no cover to old deprecated modules.