Coverage decreased (-1.8%) to 75.0% when pulling 5d376a5 on feature/resolver-pattern-engines into 1d28ab0 on dev.

I can not approve that PR at the moment. The preview is not building.

Pattern Engine undefined: good to go
Found plugin: @pattern-lab/plugin-tab
Attempting to load and initialize plugin.
where is the engine?
Error rendering pattern lab header
Omitting atoms-colors from styleguide patterns because it has an underscore prefix.
where is the engine?
error during header render()
where is the engine?
error during footer render()
where is the engine?
Error building buildFooterHTML

When I add engine mustache, it is working. (We need to get rid of that engine to be required everywhere but it's part of the UI-kit) But it still messages:
Pattern Engine undefined: good to go
Pattern Engine undefined: good to go

[...]
    "mustache": {
      "package": "@pattern-lab/engine-mustache",
      "fileExtensions": [
        "mustache"
      ]
    }
[...]