Material-ui: [Dialog] TypeScript onClose signature does not match Documentation

[nartc]

Currently the onClose callback on Dialog component does not have the correct typings:

• [x] This is not a v0.x issue.
• [x] I have searched the issues of this repository and believe that this is not a duplicate.

Expected Behavior 🤔

onClose on Dialog should have the correct typings: (event, reason)

Current Behavior 😯

Same as Summary above

Steps to Reproduce 🕹

Link:

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Context 🔦

Documentations state that onClose is a callback with signature (event, reason: string) but this doesn't seem to be correct on the typings. I need to access the reason parameter here.

DISCLAIMER: I am aware of onBackdropClick and onEscapeKeyDown event which I'm currently using but this introduces code duplication in my project.

Your Environment 🌎

| Tech | Version |
|--------------|---------|
| Material-UI | v3.9.3 |
| React | v16.8.x |
| Browser |Chrome|
| TypeScript |3.4.x|
| etc. | |

[eps1lon]

Correct. We need to add the reason parameter to

https://github.com/mui-org/material-ui/blob/f8c42a32d5de5f35e626a182c4fb81a7ce7ff615/packages/material-ui/src/Modal/Modal.d.ts#L23