build: drop node v12

[snitin315]

This PR contains a:

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

Motivation / Use-Case

Breaking Changes

Additional Info

[codecov]

Codecov Report

Merging #171 (c099308) into master (8c385a1) will not change coverage.
The diff coverage is n/a.

❗ Current head c099308 differs from pull request most recent head 3204290. Consider uploading reports for the commit 3204290 to get more accurate results

@@           Coverage Diff           @@
##           master     #171   +/-   ##
=======================================
  Coverage   95.88%   95.88%           
=======================================
  Files           3        3           
  Lines         267      267           
  Branches      107      107           
=======================================
  Hits          256      256           
  Misses         11       11           

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