Hi,

I'm trying to upgrade to elm-compiler 0.19.1.  With the attached patch, 
it fails with the following error:

Configuring elm-0.19.1...
Setup.hs: Encountered missing dependencies:
time >=1.9.1

I think that time is part of GHC.  I removed the version requirement for 
time, but then it failed with the following error:

[  8 of 130] Compiling File             ( builder/src/File.hs, dist/build/elm/elm-tmp/File.dyn_o )

builder/src/File.hs:49:13: error:
     Not in scope: ?Time.nominalDiffTimeToSeconds?
     Neither ?Data.Time.Clock? nor ?Data.Time.Clock.POSIX? exports ?nominalDiffTimeToSeconds?.
    |
49 |     (Time . Time.nominalDiffTimeToSeconds . Time.utcTimeToPOSIXSeconds)
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

How can I fix this problem?

-- 
Matthew Kraai