composer(deps-dev): bump rector/rector from 1.2.5 to 1.2.6 #1827

Job	Run time
Backward-Compatibility Analysis (8.1, locked)	13s
Code Coverage (8.1, locked)	18s
Coding Standards (8.1, locked)	21s
Dependency Analysis (8.1, locked)	15s
Mutation Tests (8.1, locked)	32s
Refactoring (8.1, locked)	22s
Security Analysis (8.1, locked)	14s
Static Code Analysis (8.1, locked)	28s
Tests (8.1, lowest)	15s
Tests (8.1, locked)	19s
Tests (8.1, highest)	15s
Tests (8.2, lowest)	26s
Tests (8.2, locked)	16s
Tests (8.2, highest)	21s
Tests (8.3, lowest)	15s
Tests (8.3, locked)	17s
Tests (8.3, highest)	22s
	5m 29s

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