Use modernized waitMe plugin

[yubiuser]

What does this PR aim to accomplish?:

Updates the used waitMe package because it's outdated and depends on an outdated jquery version

jquery  <=3.4.1
Severity: moderate
Cross-Site Scripting (XSS) in jquery - https://github.com/advisories/GHSA-rmxg-73gg-4p98
XSS in jQuery as used in Drupal, Backdrop CMS, and other products - https://github.com/advisories/GHSA-6c3j-c64m-qhgq
Potential XSS vulnerability in jQuery - https://github.com/advisories/GHSA-jpcq-cgw6-v4j6
Potential XSS vulnerability in jQuery - https://github.com/advisories/GHSA-gxr4-xjj5-5px2
No fix available
node_modules/waitme/node_modules/jquery
  waitme  *
  Depends on vulnerable versions of jquery
  node_modules/waitme

How does this PR accomplish the above?:

Replace the package with a modernized version found at https://github.com/carlosvidal/modernized-waitme which does not rely on jquery

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[yubiuser]

There is no npm package yes (carlosvidal/modernized-waitme#1), so this needs to stay as draft until we can update our package.json and package-lock.json