chore(deps-dev): bump phpstan/phpstan from 1.12.7 to 1.12.8 #1763

Job	Run time
Mutation testing	1m 30s
Code quality	21s
Backward Compatible Changes	4s
Dependencies state	55s
Integration tests on PHP 8.1	56s
Integration tests on PHP 8.2	55s
Working Nix Shell	1m 14s
Integration tests on PHP 8.3	56s
Tests on PHP 8.1	25s
Tests on PHP 8.1 --prefer-lowest --prefer-stable	20s
Tests on PHP 8.2	19s
Tests on PHP 8.2 --prefer-lowest --prefer-stable	25s
Tests on PHP 8.3	25s
Tests on PHP 8.3 --prefer-lowest --prefer-stable	25s
	9m 10s

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