add support for building tests with ghc-8.8

[cdepillabout]

When building the tests for semver-range with ghc-8.8.2, I get the following errors:

Preprocessing test suite 'unit-tests' for semver-range-0.2.8..
Building test suite 'unit-tests' for semver-range-0.2.8..

<no location info>: warning: [-Wmissing-home-modules]
    These modules are needed for compilation but not listed in your .cabal file's other-modules:
        Data.SemVer Data.SemVer.Parser Data.SemVer.Types
[1 of 4] Compiling Data.SemVer.Types ( src/Data/SemVer/Types.hs, dist/build/unit-tests/unit-tests-tmp/Data/SemVer/Types.o )
[2 of 4] Compiling Data.SemVer.Parser ( src/Data/SemVer/Parser.hs, dist/build/unit-tests/unit-tests-tmp/Data/SemVer/Parser.o )
[3 of 4] Compiling Data.SemVer      ( src/Data/SemVer.hs, dist/build/unit-tests/unit-tests-tmp/Data/SemVer.o )
[4 of 4] Compiling Main             ( tests/Unit.hs, dist/build/unit-tests/unit-tests-tmp/Main.o )

tests/Unit.hs:319:26: error:
    • Variable not in scope: fail :: String -> Expectation
    • Perhaps you meant one of these:
        ‘fail_’ (line 316), ‘tail’ (imported from ClassyPrelude),
        ‘T.tail’ (imported from Data.Text)
    |
319 |         (Left err, _) -> fail $ "Semver range parse failed: " <> show err
    |                          ^^^^

tests/Unit.hs:320:26: error:
    • Variable not in scope: fail :: String -> Expectation
    • Perhaps you meant one of these:
        ‘fail_’ (line 316), ‘tail’ (imported from ClassyPrelude),
        ‘T.tail’ (imported from Data.Text)
    |
320 |         (_, Left err) -> fail $ "Semver parse failed: " <> show err
    |                          ^^^^

I believe this is because of the monadfail changes in 8.8:

https://gitlab.haskell.org/ghc/ghc/wikis/migration/8.8#base-41300

[adnelson]

Sorry this took me a while to get to, but it should be fixed now. Please let me know if it's still problematic for you. Thanks a bunch for making this issue! :)

[cdepillabout]

Thanks for updating this!

Would you be able to make a release with this change? It looks like 0.2.8 is still the latest on Hackage: https://hackage.haskell.org/package/semver-range-0.2.8

[cdepillabout]

@adnelson Any way to get a fix for this uploaded to Hackage?