chore(flow): sync type definitions with ts

Author: evenchange4

src/index.js

@@ -13,5 +13,5 @@ export type TemplateStringsArray = $ReadOnlyArray<string>;
 export const loader = (filePath: string): DocumentNode => ({}: DocumentNode);
 export const gql = (
   taggedTemplateLiteral: TemplateStringsArray,
-  ...placeholders: any[]
+  ...nodes: DocumentNode[]
 ): DocumentNode => ({}: DocumentNode);