Fix dependency issue to vscode in preview script

src/scripts/helpers/titleCase.ts

@@ -0,0 +1,4 @@
+/** TitleCase all words in a string */
+export const toTitleCase = (str: string): string => {
+    return str.replace(/\w\S*/g, (txt) => txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase());
+};

src/scripts/preview/preview.ts

@@ -1,6 +1,6 @@
 import * as fs from 'fs';
 import * as path from 'path';
-import { toTitleCase } from '../../helpers';
+import { toTitleCase } from './../helpers/titleCase';
 import { createScreenshot } from '../helpers/screenshots';
 import * as painter from './../helpers/painter';