refactor: Node.js v10 dropped

[cap-Bernardito]

This PR contains a:

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

Motivation / Use-Case

Support Node.js 10 dropped

Breaking Changes

Support Node.js 10 dropped

Additional Info

No

[codecov]

Codecov Report

Merging #526 (07acfe4) into master (c715df2) will decrease coverage by 1.68%.
The diff coverage is 82.35%.

@@            Coverage Diff             @@
##           master     #526      +/-   ##
==========================================
- Coverage   94.93%   93.24%   -1.69%     
==========================================
  Files           5        5              
  Lines         296      296              
  Branches       96       95       -1     
==========================================
- Hits          281      276       -5     
- Misses         14       18       +4     
- Partials        1        2       +1     

Impacted Files	Coverage Δ
src/utils.js	89.52% <0.00%> (-2.66%)	⬇️
src/index.js	100.00% <100.00%> (ø)

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