WorkerCommand: refactoring #106

Job	Run time
Static analysis (ubuntu-latest, 8.1)	20s
Coding standard (ubuntu-latest, 8.1)	28s
Tests (ubuntu-latest, 7.4, false)	37s
Test for mutants (ubuntu-latest, 8.1)	1m 31s
Tests (ubuntu-latest, 8.0, false)	22s
Tests (ubuntu-latest, 8.1, false)	23s
Tests (macos-latest, 7.4, false)	1m 39s
Tests (macos-latest, 8.0, false)	2m 0s
Tests (macos-latest, 8.1, false)	45s
Tests (windows-latest, 7.4, false)	1m 2s
Tests (windows-latest, 8.0, false)	1m 5s
Tests (windows-latest, 8.1, false)	1m 4s
Tests (ubuntu-latest, 7.4, --prefer-lowest --prefer-stable, false)	24s
Tests (ubuntu-latest, 8.2, --ignore-platform-req=php+, false)	24s
Status check - CI	4s
Code coverage finish (ubuntu-latest, 8.1)	4s
	12m 12s

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