laminas-captcha 2.5.2

Based on https://github.com/zendframework/zend-captcha/releases/tag/release-2.5.2 (commit 098989fa7eefe4f023fcc8f11cc8d344dff9f649 in this repo)

Added
-----

- Nothing.

Deprecated
----------

- Nothing.

Removed
-------

- Nothing.

Fixed
-----

- **ZF2015-09**: `Laminas\Captcha\Word` generates a "word" for a CAPTCHA challenge
  by selecting a sequence of random letters from a character set. Prior to this
  vulnerability announcement, the selection was performed using PHP's internal
  `array_rand()` function. This function does not generate sufficient entropy
  due to its usage of `rand()` instead of more cryptographically secure methods
  such as `openssl_pseudo_random_bytes()`. This could potentially lead to
  information disclosure should an attacker be able to brute force the random
  number generation. This release contains a patch that replaces the
  `array_rand()` calls to use `Laminas\Math\Rand::getInteger()`, which provides
  better RNG.