Update poetry.lock

See merge request !156

Resolve "PDF export for timetables"

Closes #51

See merge request !77

Resolve "Show print timetable button on mobile devices"

Closes #130

See merge request !154

Denote Teckids e.V. as licensor as defined by EUPL

See merge request !152

This is important to clarify the jurisdiction and court location in case of
license disputes.

Prepare django 3.2 update, update JSONStore migration

See merge request !151

Resolve "Selecting a calendarweek throws error 404"

Closes #108

See merge request !148

Update lockfile

See merge request !149

Add some bug fixes for next_lesson and timetable builder

See merge request !147

Merge branch '122-next_lesson-doesn-t-correctly-work-with-changing-validity-ranges-and-probably-also-year-changes' into 'master'

Resolve "next_lesson doesn't correctly work with changing validity ranges and probably also year changes"

Closes #122

See merge request !144

Merge branch 'master' into 122-next_lesson-doesn-t-correctly-work-with-changing-validity-ranges-and-probably-also-year-changes

Build docker

See merge request !142

Merge branch '123-django-db-utils-programmingerror-relation-chronos_chronosglobalpermissions-does-not-exist' into 'master'

Resolve "django.db.utils.ProgrammingError: relation "chronos_chronosglobalpermissions" does not exist"

Closes #123

See merge request !146

Merge branch '123-django-db-utils-programmingerror-relation-chronos_chronosglobalpermissions-does-not-exist' of edugit.org:AlekSIS/official/AlekSIS-App-Chronos into 123-django-db-utils-programmingerror-relation-chronos_chronosglobalpermissions-does-not-exist

Update dependency calendarweek to ^0.5.0

See merge request !145