Fix OpenApi.IJsonSchema union type problem.

Have missed to lilst up `ITuple` type.

Author: samchon

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@samchon/openapi",
-  "version": "0.1.3",
+  "version": "0.1.4",
   "description": "",
   "main": "./lib/index.js",
   "typings": "./lib/index.d.ts",

src/OpenApi.ts

@@ -179,6 +179,7 @@ export namespace OpenApi {
     | IJsonSchema.INumber
     | IJsonSchema.IString
     | IJsonSchema.IArray
+    | IJsonSchema.ITuple
     | IJsonSchema.IObject
     | IJsonSchema.IReference
     | IJsonSchema.IOneOf