chore(interfaces): minor modifications based on reviews

fixed few things based on the review

Author: pranshuchittora

packages/utils/scaffold.ts

@@ -5,7 +5,7 @@ import * as path from "path";
 import { findProjectRoot } from "./path-utils";
 
 import { Error } from "./types";
-import { Config, TransformConfig } from "./modify-config-helper";
+import { Config, TransformConfig } from "./types/Config";
 import propTypes from "./prop-types";
 import astTransform from "./recursive-parser";
 import runPrettier from "./run-prettier";

packages/utils/types/Config.ts

@@ -4,7 +4,7 @@ export interface Config extends Object {
 	};
 	topScope?: string[];
 	configName?: string;
-	merge: object;
+	merge: string | string[];
 	webpackOptions: object;
 }