composer(deps-dev): bump ergebnis/phpunit-slow-test-detector from 2.18.0 to 2.19.0 #1711

Job	Run time
Dependency Analysis (8.1, locked)	38s
Code Coverage (8.1, locked)	20s
Backward-Compatibility Analysis (8.1, locked)	24s
Coding Standards (8.1, locked)	19s
Mutation Tests (8.1, locked)	24s
Refactoring (8.1, locked)	18s
Security Analysis (8.1, locked)	14s
Static Code Analysis (8.1, locked)	19s
Tests (8.1, lowest)	18s
Tests (8.1, locked)	20s
Tests (8.1, highest)	19s
Tests (8.2, lowest)	25s
Tests (8.2, locked)	15s
Tests (8.2, highest)	18s
Tests (8.3, lowest)	18s
Tests (8.3, locked)	19s
Tests (8.3, highest)	18s
Tests (8.4, lowest)	15s
Tests (8.4, locked)	19s
Tests (8.4, highest)	21s
	6m 41s

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