Drop support for node v12

[sodiray]

Based on chat with @matteosacchetto in #108 we'll drop support for node 12 after node v18 becomes LTS on 2022-10-25. This will be a major version bump to 9.0.0.

See Node release calendar here.

[matteosacchetto]

I would also suggest, already for release 8.0.0, adding to the package JSON the detail about the minimum supported node version, with the engines property. Reference here

Example:

{
  ...,
  "engines": {
    "node": ">=12.22.12"
  }
}

12.22.12 is the LTS version used in the test runners github actions

[MarlonPassos-git]

shouldn't you change the ci test versions too?

  ...
  node-version: [14.x, 16.x, 18.x]

[matteosacchetto]

Yes. When we will drop support for v12 there will be changes regarding Rollup, tsconfig, the ci tests and the engine specified in the package.json

As soon as node 18 lands as an LTS il will do a PR with those changes