Tests

Getting rid of warnings and hlint suggestions #269

Job	Run time
Stack (ubuntu-latest, --resolver nightly --stack-yaml stack-nightly.yaml)	11m 35s
Stack (ubuntu-latest, --resolver lts-21)	11m 47s
Stack (ubuntu-latest, --resolver lts-20 --stack-yaml stack-lts-20.yaml)	11m 14s
Stack (ubuntu-latest, --resolver lts-19 --stack-yaml stack-lts-19.yaml)	11m 23s
Stack (ubuntu-latest, --resolver lts-18 --stack-yaml stack-lts-18.yaml)	11m 16s
Stack (macos-latest, --resolver nightly --stack-yaml stack-nightly.yaml)	16m 4s
Stack (macos-latest, --resolver lts-21)	21m 43s
Stack (macos-latest, --resolver lts-20 --stack-yaml stack-lts-20.yaml)	22m 16s
Stack (macos-latest, --resolver lts-19 --stack-yaml stack-lts-19.yaml)	25m 45s
Stack (macos-latest, --resolver lts-18 --stack-yaml stack-lts-18.yaml)	24m 41s
Stack (windows-latest, --resolver nightly --stack-yaml stack-nightly.yaml)	16m 13s
Stack (windows-latest, --resolver lts-21)	17m 9s
Stack (windows-latest, --resolver lts-20 --stack-yaml stack-lts-20.yaml)	16m 36s
Stack (windows-latest, --resolver lts-19 --stack-yaml stack-lts-19.yaml)	17m 7s
Stack (windows-latest, --resolver lts-18 --stack-yaml stack-lts-18.yaml)	19m 5s
	4h 13m 54s

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