fixed "nouislider" bundle

Author: dmitry-kurmanov

package.json

@@ -1,6 +1,6 @@
 {
   "name": "surveyjs-widgets",
-  "version": "0.12.50",
+  "version": "0.12.52",
   "scripts": {
     "start": "npm run build && live-server",
     "prebuild": "webpack --env.buildType dev",

src/nouislider.js

@@ -1,3 +1,5 @@
+import noUiSlider from 'nouislider';
+
 function init(Survey) {
     var widget = {
         name: "nouislider",

webpack.config.js

@@ -114,6 +114,12 @@ module.exports = function(options) {
                 commonjs2: 'inputmask',
                 commonjs: 'inputmask',
                 amd: 'inputmask'
+            },
+            'noUiSlider': {
+                root: 'noUiSlider',
+                commonjs2: 'nouislider',
+                commonjs: 'nouislider',
+                amd: 'nouislider'
             }
         },
         plugins: [