add go.mod to test dir

[dgodd]

an empty go.mod file in the test directory stops go modules from
complaining about the purposely strange file names in the
test fixture directory

[codecov-io]

Codecov Report

Merging #16 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #16   +/-   ##
=======================================
  Coverage   83.85%   83.85%           
=======================================
  Files           1        1           
  Lines         223      223           
=======================================
  Hits          187      187           
  Misses         20       20           
  Partials       16       16

---

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[myitcv]

Just a drive-by comment here based on a conversation in Slack, but an alternative solution here would be to not commit the test directory structure at all, and instead re-create it as part of the tests.

[myitcv]

(sorry, sent that too early)

But this really is an immediate, knee-jerk thought so quite possibly I'm missing lots of history/context in making such a naive suggestion!

[dgodd]

@myitcv I am not the maintainer of this, so I will leave any decisions to others. My two cents is that, for this project, creating the fixture directory from the tests would be very tedious and make the tests harder to read. But again, I leave any such consideration to the maintainers of this repo.

[bmatcuk]

Hello, @dgodd. Sorry for the slow reply; I just got back from a long vacation. This looks good to me; thanks for the PR!