Move chalk dependency to react-dev-utils (#6150)

Related to #751

packages/react-dev-utils/chalk.js

@@ -0,0 +1,12 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+'use strict';
+
+var chalk = require('chalk');
+
+module.exports = chalk;

packages/react-dev-utils/package.json

@@ -12,6 +12,7 @@
   },
   "files": [
     "browsersHelper.js",
+    "chalk.js",
     "checkRequiredFiles.js",
     "clearConsole.js",
     "crossSpawn.js",