Replace `babel-eslint` with `@babel/eslint-parser` in blueprints

[bertdeblock]

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There are two PRs over in ember-cli, to try and make this transition happen:

• https://github.com/ember-cli/ember-cli/pull/9556
• https://github.com/ember-cli/ember-cli/pull/9669

The conclusion seemed to be that this would require an RFC.

Opening this issue as a reminder, but mainly to gather some feedback on the matter, and to see if anyone is up for writing this one.

I'm also interested in (co-)writing this RFC, but it's not 100% clear to me what exactly needs to happen.

[SergeAstapov]

The solution proposed in https://github.com/ember-cli/ember-cli/pull/9556 did seem require an RFC as it was introducing babel.config.js file.

On the other hand, solution proposed in https://github.com/ember-cli/ember-cli/pull/9669 does not require babel.config.js file as it suggests .eslintrc.js would have following part (file trimmed for clarity):

module.exports = {
  root: true,
  parser: '@babel/eslint-parser',
  parserOptions: {
    ecmaVersion: 2018,
    sourceType: 'module',
    requireConfigFile: false,
    babelOptions: {
      plugins: [
        ['@babel/plugin-proposal-decorators', { decoratorsBeforeExport: true }],
      ],
    },
  },
};

I wonder if we go this route, would we really need an RFC as it seem does not change anything as opposed to https://github.com/ember-cli/ember-cli/pull/9556 which has respective comment from @rwjblue.

[wagenet]

It looks like there may be progress on https://github.com/ember-cli/ember-cli/pull/9669. I'll leave this open for now to see where that goes.

[bertdeblock]

We've landed https://github.com/ember-cli/ember-cli/pull/10142. Thanks for everyone involved and sorry for the delay on this.