Update CI to node v16

[pankdm]

Summary

The previous PR only bumped the version, but didn't change the CI config. This is now getting fixed along with the errors discovered in CI:

• Starting npm cli v7, the user for npm run scripts changed (now this is owner of current directory: https://docs.npmjs.com/cli/v8/using-npm/scripts#user) so we need to update CircleCI script accordingly
• unhandledRejection was upgraded from Warning to Error, so we need to disable this check
• Error messages for undefined attributes got changed
• Couple of libraries updates

Test plan

• Green CI.
• Screenshots test shows very minor differences (pixel level) so should be fine.

[reg-suit[bot]]

reg-suit detected visual differences.

Check this report, and review them.

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What do the circles mean?

The number of circles represent the number of changed images.
:red_circle: : Changed items, :white_circle: : New items, :black_circle: : Deleted items, and :large_blue_circle: Passed items

How can I change the check status?

If reviewers approve this PR, the reg context status will be green automatically.