Updated to bootstrap4 beta

package.json

@@ -36,22 +36,23 @@
   },
   "dependencies": {},
   "devDependencies": {
-    "autoprefixer": "^6.7.6",
-    "babel-core": "^6.23.1",
-    "babel-loader": "^6.3.2",
-    "babel-preset-es2015": "^6.22.0",
-    "clean-webpack-plugin": "^0.1.15",
-    "css-loader": "^0.26.2",
-    "extract-text-webpack-plugin": "^2.0.0",
-    "file-loader": "^0.10.1",
+    "autoprefixer": "^7.1.3",
+    "babel-core": "^6.26.0",
+    "babel-loader": "^7.1.2",
+    "babel-preset-es2015": "^6.24.1",
+    "clean-webpack-plugin": "^0.1.16",
+    "copy-webpack-plugin": "^4.0.1",
+    "css-loader": "^0.28.5",
+    "extract-text-webpack-plugin": "^3.0.0",
+    "file-loader": "^0.11.2",
     "moment-mini": "^2.18.1",
-    "node-sass": "^4.5.0",
+    "node-sass": "^4.5.3",
     "parsleyjs": "^2.7.2",
-    "postcss-loader": "^1.3.3",
-    "sass-loader": "^6.0.2",
-    "style-loader": "^0.13.2",
-    "url-loader": "^0.5.8",
-    "webpack": "^2.2.1"
+    "postcss-loader": "^2.0.6",
+    "sass-loader": "^6.0.6",
+    "style-loader": "^0.18.2",
+    "url-loader": "^0.5.9",
+    "webpack": "^3.5.5"
   },
   "babel": {
     "presets": [

src/Backends/ParsleyBackend.php

@@ -65,39 +65,39 @@ class ParsleyBackend extends Backend
      * @var string
      * @config
      */
-    private static $error_wrapper_class = 'form-control-feedback';
+    private static $error_wrapper_class = 'invalid-feedback';
 
     /**
      * Defines the class name to add to the field group element upon error.
      *
      * @var string
      * @config
      */
-    private static $group_error_class = 'has-danger';
+    private static $group_error_class = 'has-invalid';
 
     /**
      * Defines the class name to add to the field group element upon success.
      *
      * @var string
      * @config
      */
-    private static $group_success_class = 'has-success';
+    private static $group_success_class = 'has-valid';
 
     /**
      * Defines the class name to add to the field element upon error.
      *
      * @var string
      * @config
      */
-    private static $field_error_class = 'form-control-danger';
+    private static $field_error_class = 'is-invalid';
 
     /**
      * Defines the class name to add to the field element upon success.
      *
      * @var string
      * @config
      */
-    private static $field_success_class = 'form-control-success';
+    private static $field_success_class = 'is-valid';
 
     /**
      * A string of events which will trigger validation.