Keep array()s for PHP 5.3+ compatibility

Please upgrade to PHP 5.4+

Sorry this is not a listed requirement, I will add it.

We may be in the D8 era, but according to D7's PHP requirements, the short-syntax of the arrays should not be enforced. I believe it should be set back to array()

Doesn't that page say that PHP 5.4 is the recommended minimum?

I noticed we are missing an info line for the requirement, but we can add it.

Recommended yes. Not unsupported. I wouldn't like to be the one to say no to upgrades, but the array() syntax isn't deprecated in PHP 7.0+ and that's why I stand against the [] syntax in D7.

We are upgrading to 7 but it's a slow going process at educational institutions... pity us!

Since Quiz did not advertise that it needed 5.4 I have committed this.

However, in the future there may be a release that will be marked for a minimum version of PHP.

Thank you for pitying us!

There might be more modules that drop older PHP 5 versions after core move to minimum 5.6.x (https://dri.es/the-end-of-php-5)

Changed the title of the issue for better understanding of why this is not a blocker for PHP 7.2 support.
@steinmb Dropping older PHP 5 version support doesn't mean we should always use [] instead of array() since it is not even declared as deprecated yet.