fastani: Bump revision for gcc@9

[lmrodriguezr]

• See Update gcc dependencies to gcc@9 #1186

• Also: compress test data

• Have you followed the guidelines for contributing?

• Have you checked that there aren't other open pull requests for the same formula update/change?

• Have you built your formula locally with brew install --build-from-source FORMULA, where FORMULA is the name of the formula you're submitting?

• Does your build pass brew audit --strict FORMULA (after doing brew install FORMULA)?

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[lmrodriguezr]

The formula didn't explicitly require gcc, so I added the requirement in the on_macos block. I suppose it was chain-required by boost?

In any case, please take a look in case I can implement a better solution.

[sjackman]

fastani does not need to depend on GCC on macOS.

[sjackman]

Suggested change

depends_on "gcc@9"

fastani uses libomp for OpenMP support in Clang, rather than using GCC, so it does not depend on GCC.
See PR https://github.com/brewsci/homebrew-bio/pull/1088/files
Because of that, this PR is no longer needed.

[sjackman]

Closing without merging, because fastani uses libomp rather than gcc on macOS, but thanks for this PR all the same for this PR, Luis.

[lmrodriguezr]

The gzip of the input FastA files reduces the installation to ~1/4, do you think it's worth it? I can prepare a separate commit (unless you think it may cause any issues)

[sjackman]

Sounds great! Thanks, Luis.