Change type of selectsRange back to a boolean

[mstrom20]

Is your feature request related to a problem? Please describe.
I have installed the update to v7.x.x, and I noticed the type for the option selectsRange changed from a boolean to "true"-only. This makes optional and dynamic prop-filling more inconvenient for consuming libraries.

Describe the solution you'd like
old:
{ selectsRange: never, ... } & { selectsRange: true, ... }

proposed:
{ selectsRange: boolean, ... }

[dlpmmk]

I agree