[new] add multi-select@0.9.12

[Amomo]

Hi @maruilian11 for #6618

I add multi-select at v0.9.12 and add npm auto-update config in its package.json.

repo url: https://github.com/lou/multi-select
npm package url: https://www.npmjs.com/package/multiselect

Would you mind checking this PR for me? Thank you~ :-D

• Not found on cdnjs repo
• No already exist issue and PR
• Notable popularity : Watch 73, Star 930, Fork 245
• Project has public repository on famous online hosting platform (or been hosted on npm)
• Has valid tags for each versions (for git auto-update)
• Auto-update setup
• Auto-update target/source is valid.
• Auto-update filemap is correct.

[maruilian11]

@Amomo please confirm the license with the author, thanks.
https://github.com/lou/multi-select#license

[Amomo]

@maruilian11 I have confirm that multi-select is under MIT license.
lou/multi-select#214
Could you help me checking this PR again? Thank you! :-)