Build

Include marshalling test for `Vector a` as well #588

Job	Run time
continuous-integration (8.10.7)	2m 1s
continuous-integration (9.0.2)	2m 24s
continuous-integration (9.2.8)	1m 44s
continuous-integration (9.4.5)	2m 26s
continuous-integration (9.6.4)	2m 45s
continuous-integration (9.8.2)	2m 48s
continuous-integration (9.10.1)	1m 20s
continuous-integration (9.12.1, --allow-newer=base --allow-newer=template-haskell --allow-newer=g...	3m 25s
	18m 53s

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