Update jshintrc.

Added strict, laxcomma and camelcase options.
Removed the es5 option.

.jshintrc

@@ -22,8 +22,7 @@
     "debug"         : false,
     "devel"         : true,
 
-    "es5"           : true,
-    "strict"        : false,
+    "strict"        : true,
     "globalstrict"  : true,
 
     "asi"           : false,
@@ -56,5 +55,7 @@
     "sub"           : false,
     "trailing"      : true,
     "white"         : true,
-    "indent"        : 2
+    "indent"        : 2,
+    "laxcomma"      : true,
+    "camelcase"     : true
 }

Gruntfile.js

@@ -27,7 +27,7 @@ module.exports = function (grunt) {
             'src/jquery.mousewheel.js'
           ]
         }
-      },
+      }
     },
     jshint: {
       gruntfile: {
@@ -47,7 +47,7 @@ module.exports = function (grunt) {
       strict: {
         options: {
           csslintrc: '.csslintrc',
-          import: 2
+          'import': 2
         },
         src: ['src/perfect-scrollbar.css']
       }

src/perfect-scrollbar.js

@@ -1,6 +1,7 @@
 /* Copyright (c) 2012 HyeonJe Jun (http://github.com/noraesae)
  * Licensed under the MIT License
  */
+'use strict';
 ((function ($) {
 
   // The default settings for the plugin