Update Node versions in CI

[denis-sokolov]

6 and 8 have reached their end of life, 14 and 15 are now in.

https://github.com/nodejs/Release

Checklist

• run npm run test and npm run benchmark
• tests and/or benchmarks are included
• documentation is changed or added
• commit message and code follows the Developer's Certification of Origin
  and the Code of conduct

[zekth]

Node 11 and 13 can be dropped too

[denis-sokolov]

Indeed, thanks.

[Eomm]

Since this module is used by fastify v2
https://github.com/fastify/fastify/blob/e3850c9f0936730fb2b8eaa084c78d8c3ca2ee57/package.json#L156 that support older nodejs versions, I would keep the node 6 and 8, and drop them in the next major version of this module

[denis-sokolov]

Returned 6 and 8.

[RafaelGSS]

LGTM.

[mcollina]

Please add back the ones you removed.

[denis-sokolov]

@mcollina, I’ve returned 6 and 8 a while ago. Do you mean 11 and 13, too?

[mcollina]

Essentially dropping anything from that list is a semver-major change that we are trying to avoid. Please add back 11 and 13.

[denis-sokolov]

I understand your reasons, I was looking for an explicit judgement call on your goals. Done now.

[mcollina]

lgtm