refactor: use optional chain for better readability

[noritaka1166]

use optional chain for better readability

[bcomnes]

Thanks, probably left over from an older runtime version range.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.03%. Comparing base (74201f5) to head (37a989a).
Report is 22 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #184      +/-   ##
==========================================
- Coverage   96.14%   96.03%   -0.12%     
==========================================
  Files          35       36       +1     
  Lines        2126     2142      +16     
  Branches        0       84      +84     
==========================================
+ Hits         2044     2057      +13     
- Misses         82       83       +1     
- Partials        0        2       +2     

Flag	Coverage Δ
macos-latest-20	95.84% <100.00%> (-0.21%)	⬇️
macos-latest-22	95.84% <100.00%> (?)
macos-latest-23	?
macos-latest-24	95.93% <100.00%> (?)
macos-latest-lts/*	?
ubuntu-latest-20	95.46% <100.00%> (-0.21%)	⬇️
ubuntu-latest-22	95.46% <100.00%> (?)
ubuntu-latest-23	?
ubuntu-latest-24	95.46% <100.00%> (?)
ubuntu-latest-lts/*	?
windows-latest-20	95.48% <100.00%> (-0.21%)	⬇️
windows-latest-22	95.48% <100.00%> (?)
windows-latest-23	?
windows-latest-24	95.48% <100.00%> (?)
windows-latest-lts/*	?

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[MatthiasKunnen]

Be wary that this PR changes the type from boolean to boolean | undefined. If ?? false were appended, the previous behavior is restored.

Based on the current usage of the isYarn variable, the change will not result in any problems but it is something to take heed of.

[bcomnes]

We're still working in js here so its all goooood maaaan.

[bcomnes]

But good point, random little one-off factors with no 'point' besides updated syntax often have these subtleties that can sometimes bite.