Move AlekSIS-App-Matrix to official

See merge request !10

Update dependency pytest-xprocess to ^0.19.0

See merge request AlekSIS/onboarding/AlekSIS-App-Matrix!9

Resolve "Should join room before syncing (just in case)"

Closes #13

See merge request AlekSIS/onboarding/AlekSIS-App-Matrix!8

Resolve "Use iconify for Material Icons instead of icon font"

Closes #21

See merge request AlekSIS/onboarding/AlekSIS-App-Matrix!6

Resolve "sync_profiles of spaces is never called"

Closes #19

See merge request AlekSIS/onboarding/AlekSIS-App-Matrix!5

Resolve "Cannot invite so many users at once"

Closes #9

See merge request AlekSIS/onboarding/AlekSIS-App-Matrix!4

Resolve "Review tasks"

Closes #8

See merge request AlekSIS/onboarding/AlekSIS-App-Matrix!2

Merge branch '8-review-tasks' of edugit.org:AlekSIS/onboarding/AlekSIS-App-Matrix into 8-review-tasks

Resolve "MatrixRoom.get_members returns non-members"

See merge request AlekSIS/onboarding/AlekSIS-App-Matrix!3