Version 3.3.0:
* Add expression for `@lizmap_user` and `@lizmap_user_groups` related to the
current logged user in Lizmap Web Client
* Add `FORMAT` option in the GET request to export as JPEG, PDF, PNG or SVG.
Values are from the QGIS Server documentation :
https://docs.qgis.org/latest/en/docs/server_manual/services.html#wms-getprint-format
* Display the version number in the logs when starting the plugin
* Set file permission to 744 in the ZIP by default
* Some code refactoring and cleaning
* Remove the `v` prefix in a git tag
