refactor: Node.js v10 dropped

[cap-Bernardito]

This PR contains a:

• [ ] bugfix
• [ ] new feature
• [ ] code refactor
• [ ] test update
• [ ] typo fix
• [x] metadata update

Motivation / Use-Case

Support Node.js v10 dropped

Breaking Changes

Support Node.js v10 dropped

Additional Info

No

[codecov[bot]]

Codecov Report

Merging #120 (fc39341) into master (2e1dfff) will not change coverage. The diff coverage is 18.00%.

@@           Coverage Diff           @@
##           master     #120   +/-   ##
=======================================
  Coverage   21.09%   21.09%           
=======================================
  Files           8        8           
  Lines         493      493           
  Branches       96       97    +1     
=======================================
  Hits          104      104           
  Misses        340      340           
  Partials       49       49           

Impacted Files	Coverage Δ
src/WorkerError.js	6.25% <0.00%> (ø)
src/worker.js	0.00% <0.00%> (ø)
src/workerPools.js	6.66% <0.00%> (ø)
src/WorkerPool.js	25.89% <14.28%> (ø)
src/cjs.js	100.00% <100.00%> (ø)
src/index.js	59.25% <100.00%> (ø)
src/readBuffer.js	75.00% <100.00%> (ø)
src/serializer.js	100.00% <100.00%> (ø)

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