Gitlabform

* Fixed incorrect subgroups list when requesting to process ALL_DEFINED. Completes the fix for [221](https://github.com/gitlabform/gitlabform/issues/221)

* *Really* fixed issue with `unprotect_branch_new_api`. Fixes [219](https://github.com/gitlabform/gitlabform/issues/219)
* Fixed call to a Merge Requests Approvers API endpoint removed in GitLab 13.11.0. Fixes [220](https://github.com/gitlabform/gitlabform/issues/220)
* Fixed potential security issue by enabling autoescaping when loading Jinja templates. (Bandit security tool issue [B701](https://bandit.readthedocs.io/en/latest/plugins/b701_jinja2_autoescape_false.html))

Thanks to [Pigueiras](https://github.com/Pigueiras) for his contribution!

* Fixed issue with Push Rules when the project name contains a dot. Fixes [224](https://github.com/gitlabform/gitlabform/issues/224)
* Fixed calling to process a single subgroup (like: `gitlabform 'group/subgroup'`). Fixes [221](https://github.com/gitlabform/gitlabform/issues/221)

* Fixed issue with dry-run for Project Push Rules when the current config is empty (`None`). Fixes [223](https://github.com/gitlabform/gitlabform/issues/223)

* Fixed issue with `unprotect_branch_new_api`. Fixes [219](https://github.com/gitlabform/gitlabform/issues/219)
(update: later it turned out that it was not really fixed in 2.0.2 but in 2.0.5 instead)

* Fixed issues with Jinja loader.
* Fixed calls to GitLab API that do not contain 'x-total-pages' header (gradually rolled out since [GitLab MR 23931](https://gitlab.com/gitlab-org/gitlab-foss/-/merge_requests/23931)).
* Start showing deprecation warning when using the old branch protection API config syntax.

Thanks to [mkjmdski](https://github.com/mkjmdski) for his contribution!