According to Swagger 2.0, `responses` is required. (#59)

index.d.ts

@@ -99,7 +99,7 @@ interface OperationObject {
   parameters?: ReadonlyArray<ParameterObject>
   consumes?: string[]
   produces?: string[]
-  responses?: ResponsesObject
+  responses: ResponsesObject
 }
 
 interface ResponsesObject {

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "yasway",
-  "version": "1.2.0",
+  "version": "1.3.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {

package.json

@@ -1,6 +1,6 @@
 {
   "name": "yasway",
-  "version": "1.2.0",
+  "version": "1.3.0",
   "description": "A library that simplifies Swagger integrations.",
   "main": "index.js",
   "types": "index.d.ts",