Upgrade to Node 16

[BalmungSan]

Fixes #281

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If this is the right way to do this then I would do the same on https://github.com/coursier/cache-action

[BalmungSan]

@alexarchambault I guess this is done?
BTW, not sure if this change should imply an increase in the version.

[alexarchambault]

BTW, not sure if this change should imply an increase in the version.

You mean, a major or minor version bump? I don't know, I guess I'll tag the next version as v1.3.0.

[alexarchambault]

Thanks for this PR, it's merged!

[BalmungSan]

You mean, a major or minor version bump? I don't know, I guess I'll tag the next version as v1.3.0.

@alexarchambault I mean, I don't know either. That is why I just leave the question since not sure what is the recommendation or standard followed by other actions.