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

Node.js v10 dropped

Breaking Changes

Node.js v10 dropped

Additional Info

No

[codecov]

Codecov Report

Merging #606 (2006138) into master (3a1139e) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #606   +/-   ##
=======================================
  Coverage   93.75%   93.75%           
=======================================
  Files           3        3           
  Lines         336      336           
  Branches       90       91    +1     
=======================================
  Hits          315      315           
  Misses         21       21           

Impacted Files	Coverage Δ
src/index.js	93.78% <100.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 3a1139e...2006138. Read the comment docs.