composer(deps-dev): Bump rector/rector from 1.2.0 to 1.2.1 #3000

Job	Run time
Backward-Compatibility Analysis (8.1, locked)	17s
Dependency Analysis (8.1, locked)	22s
Code Coverage (8.1, locked)	15s
Coding Standards (8.1, locked)	23s
Refactoring (8.1, locked)	14s
Security Analysis (8.1, locked)	16s
Static Code Analysis (8.1, locked)	27s
Mutation Tests (8.1, locked)	14s
Tests (8.1, lowest)	25s
Tests (8.1, locked)	14s
Tests (8.1, highest)	18s
Tests (8.2, lowest)	21s
Tests (8.2, locked)	15s
Tests (8.2, highest)	25s
Tests (8.3, lowest)	18s
Tests (8.3, locked)	19s
Tests (8.3, highest)	19s
	5m 22s

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