Issue with Closure in contentOptions for ExpandRowColumn starting from v3.2.9

[VladimirBarabash]

Prerequisites

• [x] I have searched for similar issues in both open and closed tickets and cannot find a duplicate.
• [x] The issue still exists against the latest master branch of yii2-grid.
• [x] This is not an usage question. I confirm having gone through and read the documentation and demos.
• [x] This is not a general programming / coding question. (Those should be directed to the webtips Q & A forum).
• [x] I have attempted to find the simplest possible steps to reproduce the issue.
• [ ] I have included a failing test as a pull request (Optional).

Steps to reproduce the issue

1. Render kartik\grid\GridView with kartik\grid\ExpandRowColumn with Closure in contentOptions:

   echo kartik\grid\GridView::widget([
   ...
   'columns' => [
       [
           'class' => 'kartik\grid\ExpandRowColumn',
           'value' => function ($model, $key, $index, $column) {
               return GridView::ROW_COLLAPSED;
           },
           'detailUrl' => Url::to(['/update']),
           'contentOptions' => function ($model, $key, $index, $widget) {
               return $model->isHighlighted ? ['class' => 'highlighted'] : [];
           },
       ],
       ...
   ],
   ]);

2. Open page in browser

Expected behavior and actual behavior

When I follow those steps, I see "Error. Cannot use object of type Closure as array":

I was expecting no error message, Closure in contentOptions working for ExpandRowColumn like in version 3.2.8

Environment

Browsers

• [x] Google Chrome
• [x] Mozilla Firefox
• [ ] Internet Explorer
• [ ] Safari

Operating System

• [ ] Windows
• [ ] Mac OS X
• [x] Linux
• [ ] Mobile

Libraries

• jQuery version: 2.2.4
• yii2-grid version: 3.2.9, 3.3.0, 3.3.1, 3.3.2, 3.3.3, 3.3.4, 3.3.5, dev-master

Isolating the problem

• [ ] This bug happens on the demos page
• [x] The bug happens consistently across all tested browsers
• [ ] This bug happens when using yii2-grid without other plugins.

There is no bug in version 3.2.8. There is bug in versions 3.2.9-3.3.5, dev-master