add composer to prepare_shop #4

Job	Run time
push_module / init	2m 35s
push_module / prepare_shop (8.1, 5.7)	3m 30s
push_module / prepare_shop (8.1, 8.0)	3m 35s
push_module / prepare_shop (8.2, 5.7)	3m 33s
push_module / prepare_shop (8.2, 8.0)	3m 41s
push_module / install_shop (8.1, 5.7)	3m 42s
push_module / install_shop (8.1, 8.0)	3m 37s
push_module / install_shop (8.2, 5.7)	3m 33s
push_module / install_shop (8.2, 8.0)	3m 37s
push_module / install_module (-, 8.1, 5.7)	1m 22s
push_module / install_module (-, 8.1, 8.0)	1m 10s
push_module / install_module (-, 8.2, 5.7)	1m 25s
push_module / install_module (-, 8.2, 8.0)	1m 8s
push_module / begin_test_phase	0s
push_module / begin_report_phase	0s
push_module / yamllint	4s
push_module / styles	0s
push_module / phpcs_tests	0s
push_module / actionlint	12s
push_module / codeception	0s
push_module / phpunit	0s
push_module / runtest	0s
push_module / sonarcloud	0s
push_module / finish	28s
	37m 12s

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