php7.4 notice Unparenthesized a ? b : c ? d : e is deprecated

[haohetao]

NOTICE: PHP message: PHP Deprecated: Unparenthesized a ? b : c ? d : e is deprecated. Use either (a ? b : c) ? d : e or a ? b : (c ? d : e) in /var/www/epmms2-award/vendor/kartik-v/yii2-grid/src/ColumnTrait.php on line 290

Prerequisites

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

Expected behavior and actual behavior

When I follow those steps, I see...

I was expecting...

Environment

Browsers

• Google Chrome
• Mozilla Firefox
• Internet Explorer
• Safari

Operating System

• Windows
• Mac OS X
• Linux
• Mobile

Libraries

• jQuery version:
• yii2-grid version:

Isolating the problem

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

[kartik-v]

Resolved via #938