composer(deps-dev): Bump rector/rector from 0.18.13 to 0.19.8 #112

Job	Run time
Coding Standards (8.1, locked)	21s
Code Coverage (8.1, locked)	1m 12s
Backward-Compatibility Analysis (8.1, locked)	12s
Dependency Analysis (8.1, locked)	16s
Mutation Tests (8.1, locked)	1m 14s
Refactoring (8.1, locked)	13s
Security Analysis (8.1, locked)	12s
Static Code Analysis (8.1, locked)	25s
Tests (8.1, lowest)	26s
Tests (8.1, locked)	16s
Tests (8.1, highest)	26s
Tests (8.2, lowest)	19s
Tests (8.2, locked)	19s
Tests (8.2, highest)	24s
Tests (8.3, lowest)	26s
Tests (8.3, locked)	18s
Tests (8.3, highest)	20s
	7m 19s

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