Based on https://github.com/zendframework/zend-servicemanager/releases/tag/release-3.1.2 (commit e735180eaa863b3e538ba39daef241baf6441a78 in this repo)

Added
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- Nothing.

Deprecated
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- Nothing.

Removed
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- Nothing.

Fixed
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- [zendframework/zend-servicemanager#167](https://github.com/zendframework/zend-servicemanager/pull/167) fixes
  how exception codes are provided to ServiceNotCreatedException. Previously,
  the code was provided as-is. However, some PHP internal exception classes,
  notably PDOException, can sometimes return other values (such as strings),
  which can lead to fatal errors when instantiating the new exception. The
  patch provided casts exception codes to integers to prevent these errors.