refactor: some of the statements are redundant. It is not necessary to write to write only properties.

Author: n1ru4l

src/TypeScriptGenerator.ts

@@ -150,13 +150,9 @@ function makeProp(
       )
     );
   }
-  const typeProperty = objectTypeProperty(key, value);
-  if (conditional) {
-    // @ts-ignore
-    typeProperty.questionToken = ts.factory.createToken(
-      ts.SyntaxKind.QuestionToken
-    );
-  }
+  const typeProperty = objectTypeProperty(key, value, {
+    optional: conditional,
+  });
 
   return typeProperty;
 }
@@ -559,10 +555,7 @@ function createVisitor(
           ts.factory.createTypeReferenceNode(dataTypeName, undefined),
           { optional: true }
         );
-        // @ts-ignore
-        refTypeDataProperty.questionToken = ts.factory.createToken(
-          ts.SyntaxKind.QuestionToken
-        );
+
         const refTypeFragmentRefProperty = objectTypeProperty(
           FRAGMENT_REFS,
           ts.factory.createTypeReferenceNode(FRAGMENT_REFS_TYPE_NAME, [
@@ -752,13 +745,9 @@ function makeRawResponseProp(
     );
   }
 
-  const typeProperty = objectTypeProperty(key, value);
-  if (conditional) {
-    // @ts-ignore
-    typeProperty.questionToken = ts.factory.createToken(
-      ts.SyntaxKind.QuestionToken
-    );
-  }
+  const typeProperty = objectTypeProperty(key, value, {
+    optional: conditional,
+  });
 
   return typeProperty;
 }