CI/CD

work on some css-4 features #135

Job	Run time
Look for todos	5s
Build the Haddock documentation	18m 19s
Build the Haskell software (lts-10)	7m 5s
Run the tests (lts-10)	8m 46s
Build the Haskell software (lts-11)	7m 22s
Check for hlint suggestions	8s
Run the tests (lts-11)	8m 23s
Build the Haskell software (lts-12)	7m 3s
Run the tests (lts-12)	8m 20s
Build the Haskell software (lts-13)	7m 57s
Run the tests (lts-13)	8m 33s
Build the Haskell software (lts-14)	7m 50s
Deploy documentation to GitHub pages	0s
Run the tests (lts-14)	8m 30s
Build the Haskell software (lts-15)	7m 43s
Run the tests (lts-15)	8m 34s
Build the Haskell software (lts-16)	7m 56s
Run the tests (lts-16)	3m 14s
Build the Haskell software (lts-17)	7m 55s
Build the Haskell software (lts-18)	7m 51s
Run the tests (lts-18)	3m 13s
Build the Haskell software (lts-19)	8m 18s
Run the tests (lts-19)	3m 10s
Build the Haskell software (lts-20)	7m 43s
Run the tests (lts-20)	2m 25s
Build the Haskell software (lts-21)	8m 21s
Run the tests (lts-21)	2m 27s
Deploy package on hackage	0s
	2h 57m 11s

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