add decode array method

MVMCore/MVMCore/Models/Model/ModelRegistry.swift

@@ -102,6 +102,13 @@ extension KeyedDecodingContainer where Key: CodingKey {
         }
         return models.count > 0 ? models : nil
     }
+    
+    public func decodeArray<C:CodingKey>(codingKey: KeyedDecodingContainer<K>.Key, typeCodingKey: C) throws -> [Model] {
+        guard let models: [Model] = try decodeArrayIfPresent(codingKey: codingKey, typeCodingKey: typeCodingKey) else {
+            throw ModelRegistry.Error.decoderErrorObjectNotPresent
+        }
+        return models
+    }
 }