Make compatible with Julia v1.13

[icweaver]

Closes #113

Uses fix suggested in JuliaLang/julia#53462 (comment)

One thing I notice is that the test ordering seems like it can change now:

Julia 1.11.6

Test Summary:           | Pass  Total  Time
Package                 |   12     12  0.3s
  test/runtests.jl      |    3      3  0.3s
    default_imports     |    1      1  0.2s
    TestSetup           |    2      2  0.0s
  src/TestItemRunner.jl |    9      9  0.0s
    compute_line_column |    9      9  0.0s
     Testing TestItemRunner tests passed

Julia 1.13.0--DEV.1109

Test Summary:           | Pass  Total  Time
Package                 |   12     12  0.6s
  src/TestItemRunner.jl |    9      9  0.5s
    compute_line_column |    9      9  0.5s
  test/runtests.jl      |    3      3  0.1s
    default_imports     |    1      1  0.0s
    TestSetup           |    2      2  0.0s
     Testing TestItemRunner tests passed

Not sure if that is a blocker, or if I am just holding it wrong?

[codecov]

Codecov Report

❌ Patch coverage is 82.60870% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 92.36%. Comparing base (9855a17) to head (35b874c).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/TestItemRunner.jl	82.60%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #114      +/-   ##
==========================================
- Coverage   93.07%   92.36%   -0.72%     
==========================================
  Files           2        2              
  Lines         130      131       +1     
==========================================
  Hits          121      121              
- Misses          9       10       +1     

Flag	Coverage Δ
unittests	92.36% <82.60%> (-0.72%)	⬇️

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[icweaver]

Howdy all, just leaving a light ping here.

Would it also be helpful to add v1.12 and nightly to the jlpkgbutler-ci-master-workflow.yml and jlpkgbutler-ci-pr-workflow.yml workflows?