Upgrade to latest jQuery 3.6.0 with migrate 3.4.0 throws some deprecation-infos

[McOlsa]

After upgrading to jQuery 3.6.0 I get several deprecation-messages from jquery-migrate 3.4.0 which is additionally included.

Examples:

jQuery.fn.click() event shorthand is deprecated
jQuery.isArray is deprecated; use Array.isArray
jQuery.fn.change() event shorthand is deprecated
jQuery.fn.keydown() event shorthand is deprecated

It's all easy to fix.

It would be great that spectrum does not break with the next version of jquery.