export evaluate (#207)

* export evaluate

* add changeset

.changeset/eighty-rivers-deliver.md

@@ -0,0 +1,5 @@
+---
+"@vercel/flags-core": patch
+---
+
+export evaluate fn

packages/vercel-flags-core/src/index.ts

@@ -13,6 +13,7 @@ export { EdgeConfigDataSource, InMemoryDataSource };
 export { store } from './store';
 export { type Packed, ResolutionReason as Reason } from './types';
 export type { DataSource };
+export { evaluate } from './evaluate';
 
 let defaultFlagsClient: FlagsClient | null = null;