Version 0.11 with new enums

[barche]

• Remove Requires.jl dependency since with a minimal Julia version of 1.10 this is no longer needed
• The Qt enum types (e.g. QML.Orientation from the item model) are now mapped to complete Julia @enum types, to accommodate working with the newly added mouse and keyboard enums. This implies that they are no longer automatically considered as an Integer, which may in rare cases cause an error in code that relies on this.