Fix broken generation

[martinssipenko]

This PR fixes currently broken generation by:

• Upgrading minimum PHPStan version to one where this fix was release;
• Adding conditions for extra functionality that has been added to PHPStans functionMap.

[martinssipenko]

cc'ing @simPod as he did fix PHPSstan and might be interested in this.

[simPod]

Nope, there's several PRs pending, not giving this more time. https://github.com/thecodingmachine/safe/pulls/simPod