PHPStan のエラー修正 #585

Job	Run time
Run on Linux (test:e2e, test/front_login)	4m 12s
Installer test (pgsql, 5.4)	4m 10s
Run on Linux (test:e2e, test/front_guest)	3m 37s
Installer test (pgsql, 5.5)	3m 46s
Installer test (pgsql, 5.6)	3m 16s
Run on Linux (test:e2e, test/admin)	3m 33s
Installer test (pgsql, 7.0)	3m 18s
Run on Linux (test:e2e-extends, test/front_login)	3m 35s
Installer test (pgsql, 7.1)	4m 57s
Run on Linux (test:e2e-extends, test/front_guest)	3m 0s
Installer test (pgsql, 7.2)	3m 35s
Run on Linux (test:e2e-extends, test/admin)	3m 26s
Installer test (pgsql, 7.3)	2m 53s
Installer test (pgsql, 7.4)	3m 20s
Installer test (pgsql, 8.0)	3m 14s
Installer test (pgsql, 8.1)	4m 5s
Installer test (pgsql, 8.2)	3m 9s
Installer test (pgsql, 8.3)	3m 16s
Installer test (mysql, 5.4)	4m 25s
Installer test (mysql, 5.5)	3m 51s
Installer test (mysql, 5.6)	3m 40s
Installer test (mysql, 7.0)	3m 29s
Installer test (mysql, 7.1)	3m 25s
Installer test (mysql, 7.2)	3m 20s
Installer test (mysql, 7.3)	2m 59s
Installer test (mysql, 7.4)	3m 17s
Installer test (mysql, 8.0)	3m 13s
Installer test (mysql, 8.1)	3m 7s
Installer test (mysql, 8.2)	3m 15s
Installer test (mysql, 8.3)	3m 18s
	1h 45m 41s

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