cherry pick from forks:

unicode support:

• https://github.com/liubole/jquery.hotkeys/commit/2bbe024cc40c68726a9c9dff65bf543a852f54c5

add min file / cleanup for ci:

• https://github.com/IceCreamYou/jquery.hotkeys/commit/eab1119a1e0e2371994a86d2e954095355865884
• https://github.com/peterseverin/jquery.hotkeys/commit/3b4691d2600f2ce57418641ad2546d04f86fab25