Update the plugins.qmltypes meta data.
Update the plugins.qmltypes meta data.

I forgot to do this when I introduced the QQmlWebSocketServer.

Change-Id: I7fd7354cf42f633973e0da71d854594627e2fb97
Reviewed-by: Oswald Buddenhagen <6a8868beda3e139b5ac22b2534a23d3e6ba81819@theqtcompany.com>
Reviewed-by: Allan Sandfeld Jensen <f5a9a84415b663fe4d094a945e01bbe7a67dd5eb@digia.com>

pixty/qtwebsockets,pixty/qtwebsockets