Expose isJson and isYaml in @gitbook/openapi-parser (#3447)

.changeset/wicked-apes-remember.md

@@ -0,0 +1,5 @@
+---
+"@gitbook/openapi-parser": minor
+---
+
+Expose `isJson` and `isYaml` in OpenAPI parser

packages/openapi-parser/src/index.ts

@@ -1,6 +1,6 @@
 export { parseOpenAPI } from './parse';
 
-export { dereference } from '@scalar/openapi-parser';
+export { dereference, isJson, isYaml } from '@scalar/openapi-parser';
 export type { AnyObject } from '@scalar/openapi-parser';
 export type * from '@scalar/openapi-types';
 export * from './error';