fix: add node 16 to CI

[anshumanv]

What kind of change does this PR introduce?

chore

Did you add tests for your changes?
NA

If relevant, did you update the documentation?
NA

Summary
run tests on node 16

Does this PR introduce a breaking change?
shouldn't

Other information

[anshumanv]

opened as draft to prevent accidental merge, lets watch CI

[codecov]

Codecov Report

Merging #2760 (7cbc1d4) into master (f0b9274) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2760   +/-   ##
=======================================
  Coverage   95.96%   95.96%           
=======================================
  Files          31       31           
  Lines        1634     1634           
  Branches      475      476    +1     
=======================================
  Hits         1568     1568           
  Misses         66       66           

Impacted Files	Coverage Δ
packages/webpack-cli/lib/webpack-cli.js	96.74% <0.00%> (ø)

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[anshumanv]

@alexander-akait yep it was node-sass, replacing with sass worked, thanks 👍

[alexander-akait]

Looks, all is fine, feel free to merge after CI will be green