fix upload mp4

package.json

 {
     "name": "react-ag-qeditor",
-    "version": "1.0.81",
+    "version": "1.0.82",
     "description": "WYSIWYG html editor",
     "author": "atma",
     "license": "MIT",

src/QEditor.jsx

@@ -657,7 +657,7 @@ const QEditor = ({
                     </Fragment>
                 )
             case 'video':
-                return <Fragment>{getUploader({accept: 'video/*'})}</Fragment>
+                return <Fragment>{getUploader({accept: 'video/mp4,.mp4'})}</Fragment>
             case 'image':
                 return <Fragment>{getUploader({accept: 'image/*'})}</Fragment>
             case 'file':