[import/order] newlines-between option breaks when alphabetize is enabled

[mixvar]

When I enable newlines-between: always together with alphabetize the linter acts as if every import was its separate group - newline between every single import is forced.

config:

    "import/order": [
      "error",
      {
        "newlines-between": "always",
        "alphabetize": { "order": "asc" },
        "groups": [
          "builtin",
          "external",
          "internal",
          "parent",
          "sibling",
          "index"
        ]
      }
    ]

expected:

import external1 from 'A'
import external2 from 'B'

import sibling1 from './a'
import sibling2 from './b'

actual:

import external1 from 'A'

import external2 from 'B'

import sibling1 from './a'

import sibling2 from './b'

context:

    "eslint": "6.8.0",
    "@typescript-eslint/eslint-plugin": "2.14.0",
    "@typescript-eslint/parser": "2.14.0",
    "eslint-plugin-import": "2.19.1",

[ljharb]

This is fixed in #1562 but not yet released. Duplicate of #1561.