For each binding there should be a property and that property should
have a type we recognize.
Enums can be property types in C++. We support this by adding child
scopes for such enums. The child scopes are then referenced by the
QQmlJSMetaEnums and derive from int.
The test then reveals that we were missing a few properties in
QtQuick.tooling. Add those.
Pick-to: 6.1
Change-Id: I1deef94393ee0e17d34c2dc5980ebfbf25417f36
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>