update to node16 (node12 support deprecated)

[henrygab]

See https://github.blog/changelog/2022-09-22-github-actions-all-actions-will-begin-running-on-node16-instead-of-node12/.

Every user of this action is now getting warnings (not yet errors). For example:

Node.js 12 actions are deprecated. For more information see: https://github.blog/changelog/2022-09-22-github-actions-all-actions-will-begin-running-on-node16-instead-of-node12/. Please update the following actions to use Node.js 16: arduino/setup-arduino-cli

I have verified this small change removes this warning when I point to this PR branch. Given the simplicity of the fix, I hope that's sufficient.

[CLAassistant]

All committers have signed the CLA.

[henrygab]

• Update package-lock.json file to the lockfileVersion 2 data format used by Node.js 16.x
• Update the unit test workflow to run the tests using Node.js 16.x (it is currently using 10.x 👴)

I updated the test runner to install Node 16.x instead of Node 10.x. I realize that validation is still necessary, and I am not familiar enough to attempt the lockfile changes. (while I love learning, time is a limiting factor.)

Thank you for self-assigning!

[astraw]

I am getting this warning, too. @per1234 are there any remaining issues? AFAICS the changed requested have now been made. It would be great to make a release with to address the warning.

[lhstrh]

Is there anything left to do before this can get merged and released? It would be great to get rid of the warnings...

[ChanceCuddeback]

What is the status on this. I am a beginner at Github Actions so it may be my fault, but the action is now broken? Do I have to used a differenct verison of the action?

[joshua-8]

@ChanceCuddeback This action is still working for me here, though there are warnings that the action will stop working soon, so I hope it is fixed soon. Thank you Arduino Team for all your work.

[per1234]

Closing as superseded by https://github.com/arduino/setup-arduino-cli/pull/54