phpunit: fix deprecation warnings #1590

Job	Run time
code-style-and-static-analysis	1m 14s
Test Suite (7.4, sqlite, 5-min)	52s
Test Suite (7.4, sqlite, 5-max)	1m 21s
Test Suite (7.4, mysql, 5-min)	1m 7s
Test Suite (7.4, mysql, 5-max)	1m 34s
Test Suite (7.4, pgsql, 5-min)	1m 11s
Test Suite (7.4, pgsql, 5-max)	1m 45s
Test Suite (7.4, agnostic, 5-min)	28s
Test Suite (7.4, agnostic, 5-max)	54s
Test Suite (8.2, sqlite, 5-min)	47s
Test Suite (8.2, sqlite, 5-max)	51s
Test Suite (8.2, sqlite, 6-min)	47s
Test Suite (8.2, sqlite, 6-max)	47s
Test Suite (8.2, sqlite, 7-min)	55s
Test Suite (8.2, sqlite, 7-max)	47s
Test Suite (8.2, mysql, 5-min)	40s
Test Suite (8.2, mysql, 5-max)	41s
Test Suite (8.2, mysql, 6-min)	37s
Test Suite (8.2, mysql, 6-max)	38s
Test Suite (8.2, mysql, 7-min)	42s
Test Suite (8.2, mysql, 7-max)	30s
Test Suite (8.2, pgsql, 5-min)	1m 17s
Test Suite (8.2, pgsql, 5-max)	1m 8s
Test Suite (8.2, pgsql, 6-min)	1m 9s
Test Suite (8.2, pgsql, 6-max)	1m 11s
Test Suite (8.2, pgsql, 7-min)	1m 8s
Test Suite (8.2, pgsql, 7-max)	1m 11s
Test Suite (8.2, agnostic, 5-min)	31s
Test Suite (8.2, agnostic, 5-max)	33s
Test Suite (8.2, agnostic, 6-min)	32s
Test Suite (8.2, agnostic, 6-max)	32s
Test Suite (8.2, agnostic, 7-min)	33s
Test Suite (8.2, agnostic, 7-max)	24s
	29m 17s

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