chore: run unit tests on multiple node versions

[spnraju]

Description

Fixes #1118 : updating GitHub workflow to run unit tests on multiple versions (14, 16, and 18) of nodejs

Changes

Added a matrix to Github actions for unit tests. This helps in running tests on multiple Nodejs versions.

Checks

• Project Builds
• Project passes tests and checks
• Updated documentation accordingly

[NickSeagull]

Woah thanks for this! Let's see how well it fares against multiple versions 😅

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Legend

[NickSeagull]

Hello @spnraju , we're currently moving a lot of stuff in the 1.0.0 branch, mainly switching build tools. This PR hasn't been merged because it'd make all PRs to fail to merge, and for now everything (at least) works in 16.

As soon as 1.0.0 gets merged, we'll take action on this PR and make sure it builds with all node versions. Thanks a lot!

[javiertoledo]

This PR would need to be reworked as we've migrated to MS Rush since it was opened. I'll close it and let @NickSeagull decide the next steps, as he's currently reworking the CI/CD processes.