composer(deps-dev): bump phpstan/phpstan from 1.12.5 to 1.12.6 #3079

Job	Run time
Code Coverage (8.1, locked)	16s
Dependency Analysis (8.1, locked)	16s
Backward-Compatibility Analysis (8.1, locked)	13s
Coding Standards (8.1, locked)	15s
Mutation Tests (8.1, locked)	19s
Refactoring (8.1, locked)	15s
Security Analysis (8.1, locked)	18s
Static Code Analysis (8.1, locked)	33s
Tests (8.1, lowest)	23s
Tests (8.1, locked)	19s
Tests (8.1, highest)	15s
Tests (8.2, lowest)	22s
Tests (8.2, locked)	21s
Tests (8.2, highest)	16s
Tests (8.3, lowest)	15s
Tests (8.3, locked)	14s
Tests (8.3, highest)	15s
	5m 5s

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