Updating the plugin to use version 4.8 of bootstrap slider

Updating the tests to use version 4.8 of the bootstrap slider. Also fixing
bug by renaming "$.fn.slider.Constructor" to "$.fn.slider.constructor"

Author: thisispaul

.gitignore

@@ -1,3 +1,7 @@
 # bower #
 #########
-bower_components
+bower_components
+
+# jetbrains #
+#############
+.idea

bower.json

@@ -22,7 +22,7 @@
     "tests"
   ],
   "dependencies": {
-    "seiyria-bootstrap-slider": "~3.1.0",
+    "seiyria-bootstrap-slider": "~v4.8",
     "angular": "~1.2.16"
   }
 }

slider.js

@@ -13,7 +13,7 @@ angular.module('ui.bootstrap-slider', [])
                 ngModel: '=',
                 range:'=',
                 sliderid: '=',
-                formater: '&',
+                formatter: '&',
                 onStartSlide: '&',
                 onStopSlide: '&',
                 onSlide: '&'
@@ -91,17 +91,17 @@ angular.module('ui.bootstrap-slider', [])
                         setFloatOption('value', $scope.value, 5);
                     }
 
-                    if ($scope.formater) options.formater = $scope.$eval($scope.formater);
+                    if ($scope.formatter) options.formatter = $scope.$eval($scope.formatter);
 
                     var slider = $(element).find( ".slider-input" ).eq( 0 );
 
                     // check if slider jQuery plugin exists
                     if( $.fn.slider ) {
                         // adding methods to jQuery slider plugin prototype
-                        $.fn.slider.Constructor.prototype.disable = function () {
+                        $.fn.slider.constructor.prototype.disable = function () {
                             this.picker.off();
                         };
-                        $.fn.slider.Constructor.prototype.enable = function () {
+                        $.fn.slider.constructor.prototype.enable = function () {
                             this.picker.on();
                         };