Add return type to migration up command #1529

Job	Run time
code-style-and-static-analysis	2m 28s
Test Suite (7.4, sqlite, 4-min)	59s
Test Suite (7.4, sqlite, 4-max)	53s
Test Suite (7.4, sqlite, 5-min)	1m 2s
Test Suite (7.4, sqlite, 5-max)	1m 7s
Test Suite (7.4, mysql, 4-min)	1m 14s
Test Suite (7.4, mysql, 4-max)	1m 16s
Test Suite (7.4, mysql, 5-min)	1m 11s
Test Suite (7.4, mysql, 5-max)	1m 20s
Test Suite (7.4, pgsql, 4-min)	1m 19s
Test Suite (7.4, pgsql, 4-max)	1m 13s
Test Suite (7.4, pgsql, 5-min)	1m 20s
Test Suite (7.4, pgsql, 5-max)	1m 26s
Test Suite (7.4, agnostic, 4-min)	28s
Test Suite (7.4, agnostic, 4-max)	30s
Test Suite (7.4, agnostic, 5-min)	29s
Test Suite (7.4, agnostic, 5-max)	33s
Test Suite (8.2, sqlite, 4-max)	58s
Test Suite (8.2, sqlite, 5-min)	48s
Test Suite (8.2, sqlite, 5-max)	55s
Test Suite (8.2, sqlite, 6-min)	48s
Test Suite (8.2, sqlite, 6-max)	47s
Test Suite (8.2, mysql, 4-max)	1m 21s
Test Suite (8.2, mysql, 5-min)	1m 32s
Test Suite (8.2, mysql, 5-max)	1m 25s
Test Suite (8.2, mysql, 6-min)	1m 32s
Test Suite (8.2, mysql, 6-max)	1m 29s
Test Suite (8.2, pgsql, 4-max)	1m 13s
Test Suite (8.2, pgsql, 5-min)	1m 8s
Test Suite (8.2, pgsql, 5-max)	1m 9s
Test Suite (8.2, pgsql, 6-min)	1m 11s
Test Suite (8.2, pgsql, 6-max)	1m 11s
Test Suite (8.2, agnostic, 4-max)	27s
Test Suite (8.2, agnostic, 5-min)	25s
Test Suite (8.2, agnostic, 5-max)	22s
Test Suite (8.2, agnostic, 6-min)	21s
Test Suite (8.2, agnostic, 6-max)	22s
	38m 12s

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