v0.27.11.1

Merge remote-tracking branch 'upstream/master'

# Conflicts:
#	MatrixSDK/Contrib/Swift/JSONModels/MXEvent.swift

v0.27.11

https://github.com/matrix-org/matrix-ios-sdk/releases/tag/v0.27.11

v0.27.4

Source to https://github.com/matrix-org/matrix-ios-sdk/releases/tag/v0.27.4

v0.26.4.13

Fix wrong call id on hangup busy

v0.26.4.12

Fix hangup only if any call is running

v0.26.4.11

MXCall fixes

v0.26.4.10

Add maximum active calls configuration

v0.26.4.9

Add missing gk.call event handlers

v0.26.4.8

Add answer call timestamp

v0.26.4.7

Return CallStackCall