feat(types): export Plugin type (#1071)

Author: oktapodia

src/index.ts

@@ -2,7 +2,7 @@ export * from './factory';
 
 export * from './handlers';
 
-export type { Filter, Options, RequestHandler } from './types';
+export type { Plugin, Filter, Options, RequestHandler } from './types';
 
 /**
  * Default plugins