Bump phpstan/phpstan from 1.8.2 to 1.12.7 #86

Job	Run time
BC Check	8s
Coding Standards / Coding Standards (8.0)	18s
Code Coverage / Code Coverage	20s
Dependency analysis / Dependency Analysis (8.0)	21s
Lint root / Lint yaml & Composer (8.0)	13s
Static analysis / Static Code Analysis (8.0)	15s
Unit test / Supported Versions Matrix	3s
Unit test / Tests (7.4, lowest)	17s
Unit test / Tests (7.4, locked)	11s
Unit test / Tests (7.4, highest)	16s
Unit test / Tests (8.0, lowest)	31s
Unit test / Tests (8.0, locked)	11s
Unit test / Tests (8.0, highest)	18s
Unit test / Tests (8.1, lowest)	27s
Unit test / Tests (8.1, locked)	17s
Unit test / Tests (8.1, highest)	22s
Unit test / Tests (8.2, lowest)	17s
Unit test / Tests (8.2, locked)	19s
Unit test / Tests (8.2, highest)	32s
Unit test / Tests (8.3, lowest)	38s
Unit test / Tests (8.3, locked)	19s
Unit test / Tests (8.3, highest)	22s
Unit test / Tests (8.4, lowest)	34s
Unit test / Tests (8.4, locked)	20s
Unit test / Tests (8.4, highest)	43s
	8m 32s

Provide feedback