Update webpack, add hashtag.js asset

webpack.mix.js

@@ -30,6 +30,7 @@ mix.js('resources/assets/js/app.js', 'public/js')
 .js('resources/assets/js/lib/ace/theme-monokai.js', 'public/js')
 // .js('resources/assets/js/embed.js', 'public')
 // .js('resources/assets/js/direct.js', 'public/js')
+.js('resources/assets/js/hashtag.js', 'public/js')
 .extract([
 	'lodash',
 	'popper.js',