fix(types): missing supportedMethods (fastify#5970)

* fix(types): missing supportedMethods

Signed-off-by: Johaven <[email protected]>

* test(instance): supportedMethods

---------

Signed-off-by: Johaven <[email protected]>

Author: johaven

test/types/instance.test-d.ts

@@ -36,6 +36,7 @@ expectType<unknown>(server.getSchema('SchemaId'))
 expectType<string>(server.printRoutes())
 expectType<string>(server.printPlugins())
 expectType<string>(server.listeningOrigin)
+expectType<string[]>(server.supportedMethods)
 
 expectAssignable<FastifyInstance>(
   server.setErrorHandler(function (error, request, reply) {

types/instance.d.ts

@@ -548,6 +548,10 @@ export interface FastifyInstance<
    * Remove all content type parsers, including the default ones
    */
   removeAllContentTypeParsers: removeAllContentTypeParsers
+  /**
+   * Returns an array of strings containing the list of supported HTTP methods
+   */
+  supportedMethods: string[]
   /**
    * Add a non-standard HTTP method
    *