composer(deps-dev): Bump rector/rector from 1.2.5 to 1.2.6 #1579

Job	Run time
Refactoring (8.1, locked)	29s
Coding Standards (8.1, locked)	19s
Backward-Compatibility Analysis (8.1, locked)	18s
Code Coverage (8.1, locked)	17s
Dependency Analysis (8.1, locked)	33s
Security Analysis (8.1, locked)	25s
Static Code Analysis (8.1, locked)	29s
Tests (8.1, lowest)	21s
Tests (8.1, locked)	16s
Tests (8.1, highest)	16s
Tests (8.2, lowest)	30s
Tests (8.2, locked)	15s
Tests (8.2, highest)	33s
Tests (8.3, lowest)	24s
Tests (8.3, locked)	24s
Tests (8.3, highest)	28s
	6m 17s

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