composer(deps-dev): bump ergebnis/phpunit-slow-test-detector from 2.17.0 to 2.18.0 #4107

Job	Run time
Backward-Compatibility Analysis (8.1, locked)	18s
Code Coverage (8.1, locked)	19s
Coding Standards (8.1, locked)	17s
Dependency Analysis (8.1, locked)	31s
Mutation Tests (8.1, locked)	45s
Refactoring (8.1, locked)	19s
Security Analysis (8.1, locked)	16s
Static Code Analysis (8.1, locked)	36s
Tests (8.1, lowest)	28s
Tests (8.1, locked)	16s
Tests (8.1, highest)	20s
Tests (8.2, lowest)	19s
Tests (8.2, locked)	18s
Tests (8.2, highest)	29s
Tests (8.3, lowest)	17s
Tests (8.3, locked)	16s
Tests (8.3, highest)	26s
	6m 30s

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