Fix wrong id type in DndEventInfo

[shueja]

When logging e.detail.info it shows that id is a number, just like in the items list. However, the typings show DndEventInfo.id to be a string, which is incorrect.

[isaacHagoel]

the id would be whatever was passed in to the lib, no? as in if u pass in a string it will be a string if u pass in a number it will be a number

[shueja]

The examples all use numbers, so I figured that id was required to be a number. Looking at the typings it's not even enforced that Item has an id property. Either way, the typings expect id in DndEventInfo to be a string, with no regard to what is passed into the library. To my knowledge, there's not a super good way to make DndEventInfo expect an id type that matches the item type, but that would be the ideal.

[isaacHagoel]

I agree that it would be ideal if possible, and i think that in most real life cases it would be a string (but enforcing it might break existing users)