chore: Support Node 18 and 20

[congminh1254]

• Overrides leche package deps with mocha version ^10.2.0
• Update CI to run on Node 18, 20.
• Bump version of nock, @type/node.

[coveralls]

Pull Request Test Coverage Report for Build 5268993746

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 95.747%

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Totals
Change from base Build 5143895756:	0.0%
Covered Lines:	2939
Relevant Lines:	3037

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💛 - Coveralls

[bartlomiejleszczynski]

🍾