bugfix(@nestjs/core) export FastifyAdapter at the root level nestjs#622

Author: kamilmysliwiec

packages/core/index.ts

@@ -9,6 +9,7 @@ export { MiddlewareBuilder } from './middleware/builder';
 export { ModuleRef } from './injector/module-ref';
 export { NestFactory } from './nest-factory';
 export { APP_INTERCEPTOR, APP_FILTER, APP_GUARD, APP_PIPE } from './constants';
+export * from './adapters';
 export * from './services';
 export * from './nest-application';
 export * from './nest-application-context';