Update dependency babel-eslint to v9 - autoclosed

[renovate[bot]]

This Pull Request updates devDependency babel-eslint (source) from v8.2.6 to v9.0.0

Release Notes

v9.0.0

Compare Source

v9.0.0

We've released v7: https://twitter.com/left_pad/status/1034204330352500736, so this just updates babel-eslint to use those versions internally. That in itself doesn't break anything but:

• Babel now supports the new decorators proposal by default, so we need to switch between the new and the old proposal. This is a breaking change.

To enable the legacy decorators proposal users should add a specific parser option:

{
  parserOptions: {
    ecmaFeatures: {
      legacyDecorators: true
    }
  }
}

• Babel removed the support for Node 4 , so I propagated that here.

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This PR has been generated by Renovate Bot.

[renovate[bot]]

:warning: Lock file problem

Renovate failed when attempting to generate a lock file. The most frequent cause is when you have private modules but have not added configuration for private module support. It is strongly recommended that you do not merge this PR as-is.

Renovate will not retry generating a lockfile for this PR unless either (a) the package.json in this branch needs updating, or (b) you rename then delete this PR unmerged, so that it can be regenerated.

The lock file failure details are included below:

yarn.lock

error An unexpected error occurred: "https://registry.yarnpkg.com/babel-eslint: getaddrinfo ENOTFOUND registry.yarnpkg.com registry.yarnpkg.com:443".