useMap generic only accepts key type, value type is "any"

[mnassabain]

Expected to use it as useMap<KeyType, ValueType> or that it infers it from the initial value

[PalAman-git]

I would like to work on this issue, if you could guide me what it the current state and expected outcome.

[mnassabain]

@PalAman-git seems to be already proposed in #337