Support for named aggregate export pattern in import/name

Apologies if this is ultimately the same bug as described in #1583 but it is a slightly different circumstance so I wanted to post it separately in case it is distinct

Given:

// constants.js
export const x = 5
export const y = 6

// index.js
export * as constants from './constants'

The following is considered invalid:

// sandbox.js
import { constants } from './index'

Error:

ESLint: constants not found in './index' (import/named)

However, the following is considered valid

// sandbox.js
import * as blah from './index'

and indeed blah.constants is populated correctly.

My configuration:

{
  "extends": "airbnb-base",
  "parser": "babel-eslint",
  "rules": {
    "semi": [2, "never"],
    "indent": [2, "tab"],
    "no-tabs": 0
  },
  "env": {
    "es6": true,
    "node": true,
    "jest": true
  }
}

Eslint version: v6.8.0