Fix accidentally broken python 3.7 compatibility

Add reason field to leave_room and invite_user

Bump version to 0.14.8

Bump version to 0.14.7

Bump version to 0.14.6

Bump version to 0.14.5

Bump version to 0.14.4

Bump version to 0.14.3

Fix redacting events without extra_content in IntentAPI

Bump version to 0.14.1