do not trigger deprecation warnings

[t-bltg]

getproperty triggers deprecation warnings: avoid triggering those when walking modules.

Fix #83.

Also observed in the UnicodePlots test suite, unfortunately this PR only fixes GeometryBasics tests mentioned in the issue, we also need a PR in Reexports.jl or Colors.jl.

[codecov]

Codecov Report

Merging #89 (95950fd) into master (7da693b) will decrease coverage by 3.17%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #89      +/-   ##
==========================================
- Coverage   73.54%   70.37%   -3.18%     
==========================================
  Files          10       10              
  Lines         620      621       +1     
==========================================
- Hits          456      437      -19     
- Misses        164      184      +20     

Flag	Coverage Δ
unittests	70.37% <100.00%> (-3.18%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/exports.jl	88.88% <100.00%> (-11.12%)	⬇️
src/project_extras.jl	93.75% <0.00%> (-4.17%)	⬇️
src/pkg/Versions.jl	47.26% <0.00%> (-3.91%)	⬇️
src/ambiguities.jl	79.04% <0.00%> (-3.81%)	⬇️
src/deps_compat.jl	93.10% <0.00%> (-3.45%)	⬇️
src/utils.jl	91.52% <0.00%> (-1.70%)	⬇️

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more