composer(deps-dev): Bump rector/rector from 0.18.13 to 0.19.0 #1407

Job	Run time
Code Coverage (8.1, locked)	24s
Backward-Compatibility Analysis (8.1, locked)	16s
Coding Standards (8.1, locked)	20s
Dependency Analysis (8.1, locked)	17s
Mutation Tests (8.1, locked)	27s
Refactoring (8.1, locked)	15s
Security Analysis (8.1, locked)	22s
Static Code Analysis (8.1, locked)	24s
Tests (8.1, lowest)	18s
Tests (8.1, locked)	17s
Tests (8.1, highest)	19s
Tests (8.2, lowest)	29s
Tests (8.2, locked)	19s
Tests (8.2, highest)	33s
Tests (8.3, lowest)	16s
Tests (8.3, locked)	15s
Tests (8.3, highest)	22s
	5m 53s

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