Fix nodejs v14 compatibility

[legobeat]

Minimum changes to make tests pass on both nodejs v12 and v14

[socket-security]

Socket Security Pull Request Report

👍 No new dependency issues detected in pull request

Pull request report summary

Issue	Status
Install scripts	✅ 0 issues
Native code	✅ 0 issues
Bin script confusion	✅ 0 issues
Bin script shell injection	✅ 0 issues
Unresolved require	✅ 0 issues
Invalid package.json	✅ 0 issues
HTTP dependency	✅ 0 issues
Git dependency	✅ 0 issues
Potential typo squat	✅ 0 issues
Known Malware	✅ 0 issues
Telemetry	✅ 0 issues
Protestware/Troll package	✅ 0 issues

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[legobeat]

@SocketSecurity ignore keccak@3.0.2 secp256k1@4.0.3

[Gudahtt]

Any idea why this update was needed? I would have expected v4 of eth-block-tracker to work on v14.

[Gudahtt]

LGTM!