fix type issue in SchemaObject

Author: omermecitoglu

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "@omer-x/openapi-types",
-  "version": "0.1.0",
+  "version": "0.1.1",
   "description": "TypeScript types for the OpenAPI Specification",
   "keywords": [
     "swagger",

package.json

@@ -91,6 +91,10 @@ type BooleanSchema = {
   type: "boolean",
 };
 
+type UnknownSchema = {
+  type?: undefined,
+};
+
 /**
  * The Schema Object allows the definition of input and output data types. These types can be objects, but also primitives and arrays. This object is a superset of the JSON Schema Specification Draft 2020-12.
  */
@@ -102,4 +106,4 @@ export type SchemaObject = Schema & (
   ArraySchema |
   NullSchema |
   BooleanSchema
-) & ReferenceObject;
+) | (ReferenceObject & UnknownSchema);