[add-resource] New Plugin: Umami Analytics

[chraebsli]

I would like to add my new plugin to the Grav Repository.
Here are the project details: Crabston/grav-plugin-umami-analytics

[pamtbaau]

Just a quick note:
Assets should be added using the Asset Manager instead of injecting it in the generated HTML using preg_replace.

Assets can ben added when, or after, the onAssetsInitialized event is/has been fired.

[chraebsli]

Thanks for the feedback! I'll update it soon.