chore: disable Node.js 16 CI builds/tests

[danielpeintner]

Note: we can decide "when" we want to merge this PR.

fixes #1069

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: +0.29% 🎉

Comparison is base (c8177c2) 75.02% compared to head (a8c1ea4) 75.32%.
Report is 4 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1076      +/-   ##
==========================================
+ Coverage   75.02%   75.32%   +0.29%     
==========================================
  Files          80       80              
  Lines       15610    16082     +472     
  Branches     1499     1502       +3     
==========================================
+ Hits        11712    12114     +402     
- Misses       3862     3929      +67     
- Partials       36       39       +3     

see 5 files with indirect coverage changes

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.