Add jQuery 4.0.0 support (#2524)

* Initial plan

* Package: Add jQuery 4.0.0 support to peerDependencies

Co-authored-by: bytestream <1788397+bytestream@users.noreply.github.com>

* Build: Remove package-lock.json and update .gitignore

Co-authored-by: bytestream <1788397+bytestream@users.noreply.github.com>

* Chore: test on jquery 4.0.0 and mockjax 2.7.0

* Chore: bump jquery.simulate.js to 1.1.1

* Chore: replace $.trim

* Chore: fix test

* Chore: use pushStack instead of push

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: bytestream <1788397+bytestream@users.noreply.github.com>
Co-authored-by: bytestream <kieran@supportpal.com>