Create a plugin to integrate with input masking

[Eonasdan]

Prerequisites

• I have searched for duplicate or closed feature requests.
• I have read the contributing guidelines.

Proposal

In particular with the custom date formatting it would be useful to provide some hooks or something to work with an input masking library. This one might work as they have an example with momentjs and that shouldn't be difficult to replicate for use in the picker.

Likely the plugin would provide maskOptions property bag and in particular the format/parse methods

Motivation and context

Without masking, users can provide whatever they want. A mask library integration might be helpful.

[lenamtl]

I'm using this input mask (this is very flexible with regex and the ability to set mask based on condition)
vanilla JS or jQuery version
https://github.com/RobinHerbots/Inputmask

Here is my working demo
https://jsfiddle.net/lenamtl/26x3vt41/