chore: add node 18

[harish-sethuraman]

This PR contains a:

• bugfix
• new feature
• code refactor
• test update
• typo fix
• metadata update

Motivation / Use-Case

Add node 18 to test workflow

[codecov]

Codecov Report

Merging #432 (d26625c) into master (4c19ce4) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #432   +/-   ##
=======================================
  Coverage   92.16%   92.16%           
=======================================
  Files           7        7           
  Lines         587      587           
  Branches      188      188           
=======================================
  Hits          541      541           
  Misses         37       37           
  Partials        9        9           

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[snitin315]

Lint is failing on master, created #433 to fix it.

[harish-sethuraman]

Thanks :)