jsonalchemy: add tests for using the json types in an sqlalchemy context and make sure that the values returned are correctly returned and stored in the database

nix: Add pytest-sugar to our development environment

vcs: Use commit date as modification time when creating archives. #4247

release: merge back stable branch into default

Added tag v4.4.1 for changeset 8dd86b410b1a

release: Finish preparation for 4.4.1

release: updated pip2nix output for 4.4.1

docs: added release notes for 4.4.1

release: Start preparation for 4.4.1

tests: Adapt sv_support tests to recent changes. Add quates to assertions and add unicode support.