refactor(*): remove dependency on node 'util' package

[justinrassier]

re #16

[tylerhubert]

Looks good. CI passes. Tests still at 100%

[coveralls]

Pull Request Test Coverage Report for Build 50

• 11 of 11 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

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Totals
Change from base Build 49:	0.0%
Covered Lines:	255
Relevant Lines:	255

---

💛 - Coveralls

[tylerhubert]

:tada: This PR is included in version 2.3.1 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot :package::rocket: