Wrapped <error> tag in a <testcase> for XML output

[gbruer15]

Closes #97

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.40%. Comparing base (f228a7a) to head (54191fb).
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #98      +/-   ##
==========================================
+ Coverage   94.69%   96.40%   +1.71%     
==========================================
  Files           7        7              
  Lines         547      557      +10     
==========================================
+ Hits          518      537      +19     
+ Misses         29       20       -9     

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[gbruer15]

@oxinabox This is ready to merge, other than the failing tests that are outside the scope of this MR. Can you review it.

The test on Julia 1.10 is failing, but the tests on Julia 1.0, 1.6, and 1.12-nightly are passing and locally testing on 1.8 works fine.

[oxinabox]

This looks right
@mmiller-max did you know what is up with the failing test cases?

[omus]

Failure here should be addressed by #99

[oxinabox]

@gbruer15 can you rebase this against current master, and that should catch what was fixed in #99 and so we should be able to merge this.

[mmiller-max]

This looks right @mmiller-max did you know what is up with the failing test cases?

Sorry I missed this. Thanks for fixing @omus

[gbruer15]

@oxinabox This is ready to merge now.