build: fix for node 16

[RebeccaStevens]

Not required once #531 is merged was node 16 support is dropped there.
Does some of the same things as that PR.

fix #548

[github-actions]

PR Compliance Checks Passed!

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.88%. Comparing base (c87c47b) to head (344cd8d).
Report is 16 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #547      +/-   ##
==========================================
+ Coverage   80.59%   80.88%   +0.29%     
==========================================
  Files          35       35              
  Lines        6575     6655      +80     
  Branches      440      448       +8     
==========================================
+ Hits         5299     5383      +84     
+ Misses       1276     1272       -4     

Flag	Coverage Δ
4.3.5	79.65% <ø> (-0.52%)	⬇️
4.6.4	79.68% <ø> (-0.52%)	⬇️
4.9.5	79.68% <ø> (-0.52%)	⬇️
latest	80.48% <ø> (+0.20%)	⬆️

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