[BUGFIX] Unable to register a custom facet package with FacetRegistry

Resolves: #4280
Ports: #4281

Author: b3nkai

Configuration/Services.yaml

@@ -21,6 +21,7 @@ services:
       - '../Classes/Domain/Search/ResultSet/Facets/{OptionBased/Hierarchy/Node.php,*/Abstract*}'
       - '../Classes/Domain/Search/ResultSet/Facets/*/*/*Facet.php'
       - '../Classes/Domain/Search/ResultSet/Facets/RangeBased/*/*RangeCount.php'
+      - '../Classes/Domain/Search/ResultSet/Facets/FacetRegistry.php'
     public: true
     autowire: true
     shared: false