Merge remote-tracking branch 'upstream/master' into voip

.ci/script.sh

CMakeLists.txt

README.md

cmake/Findsodium.cmake

cmake/Hunter/config.cmake

cmake/HunterGate.cmake

examples/CMakeLists.txt

examples/online_backup_exporter.cpp

include/mtx/common.hpp

include/mtx/errors.hpp

include/mtx/events.hpp

include/mtx/events/aliases.hpp

include/mtx/events/avatar.hpp

include/mtx/events/canonical_alias.hpp

include/mtx/events/collections.hpp

include/mtx/events/common.hpp

include/mtx/events/create.hpp

include/mtx/events/encrypted.hpp

include/mtx/events/encryption.hpp

include/mtx/events/guest_access.hpp