Tests

Getting rid of warnings and hlint suggestions #268

Job	Run time
Stack (ubuntu-latest, --resolver nightly --stack-yaml stack-nightly.yaml)	11m 20s
Stack (ubuntu-latest, --resolver lts-21)	10m 44s
Stack (ubuntu-latest, --resolver lts-20 --stack-yaml stack-lts-20.yaml)	10m 10s
Stack (ubuntu-latest, --resolver lts-19 --stack-yaml stack-lts-19.yaml)	11m 12s
Stack (ubuntu-latest, --resolver lts-18 --stack-yaml stack-lts-18.yaml)	9m 58s
Stack (macos-latest, --resolver nightly --stack-yaml stack-nightly.yaml)	26m 45s
Stack (macos-latest, --resolver lts-21)	17m 10s
Stack (macos-latest, --resolver lts-20 --stack-yaml stack-lts-20.yaml)	25m 37s
Stack (macos-latest, --resolver lts-19 --stack-yaml stack-lts-19.yaml)	14m 31s
Stack (macos-latest, --resolver lts-18 --stack-yaml stack-lts-18.yaml)	14m 4s
Stack (windows-latest, --resolver nightly --stack-yaml stack-nightly.yaml)	15m 45s
Stack (windows-latest, --resolver lts-21)	16m 40s
Stack (windows-latest, --resolver lts-20 --stack-yaml stack-lts-20.yaml)	17m 5s
Stack (windows-latest, --resolver lts-19 --stack-yaml stack-lts-19.yaml)	18m 19s
Stack (windows-latest, --resolver lts-18 --stack-yaml stack-lts-18.yaml)	19m 17s
	3h 58m 37s

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