Ported formulation model

Signed-off-by: Steve Springett <[email protected]>

Author: stevespringett

schema/2.0/cyclonedx-2.0.schema.json

@@ -66,6 +66,9 @@
     },
     "annotations": {
       "$ref": "model/cyclonedx-annotation-2.0.schema.json#/$defs/annotations"
+    },
+    "formulation": {
+      "$ref": "model/cyclonedx-formulation-2.0.schema.json#/$defs/formulation"
     }
 
   }