composer(deps-dev): Bump rector/rector from 1.2.5 to 1.2.6 #1076

Job	Run time
Code Coverage (8.1, locked)	21s
Dependency Analysis (8.1, locked)	15s
Coding Standards (8.1, locked)	22s
Backward-Compatibility Analysis (8.1, locked)	22s
Mutation Tests (8.1, locked)	18s
Refactoring (8.1, locked)	15s
Security Analysis (8.1, locked)	14s
Static Code Analysis (8.1, locked)	31s
Tests (8.1, lowest)	13s
Tests (8.1, locked)	14s
Tests (8.1, highest)	14s
Tests (8.2, lowest)	17s
Tests (8.2, locked)	22s
Tests (8.2, highest)	17s
Tests (8.3, lowest)	14s
Tests (8.3, locked)	13s
Tests (8.3, highest)	16s
	4m 58s

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