Update plugins.qmltypes

Change-Id: I5e3ff34d8724fab19408f42984308ca12b4ff521
Reviewed-by: Alex Blasche <alexander.blasche@theqtcompany.com>
Merge remote-tracking branch 'origin/5.4.0' into 5.4

Change-Id: I3470a71b91db46ab803c2fb4de41a95ad430535e