Run tests in different node versions

[juan-fernandez]

What and why?

Run tests in different node versions to improve reliability.

At some point we'd want to test different operating systems, but windows tests are broken right now, so that will require a different PR.

How?

• Run unit tests in node@14, node@16 and node@18.

Review checklist

• [ ] Feature or bugfix MUST have appropriate tests (unit, integration)

[datadog-datadog-prod-us1[bot]]

Datadog Report

Branch report: juan-fernandez/run-tests-in-windows-and-macos Commit report: 4e35699

:white_check_mark: datadog-ci-tests 0 Failed, 0 New Flaky, 3633 Passed, 0 Skipped, 1m44.14s Wall Time