[sort-type-union-intersection-members] void should be in nullish group

[avaly]

• I have tried restarting my IDE and the issue persists.
• I have updated to the latest version of the packages.
• I have read the FAQ and my problem is not listed.

Repro

void is currently included in the keyword group, but it fits better with the nullish group.

{
  "rules": {
    "@typescript-eslint/sort-type-union-intersection-members": [2, {
      "groupOrder": [
        "literal",
        "keyword",
        "named",
        "operator",
        "function",
        "import",
        "conditional",
        "object",
        "tuple",
        "intersection",
        "union",
        "nullish"
      ]
  }
}

type Foo = void | ObjectId | null | undefined;

Expected Result

type Foo = ObjectId | null | undefined | void;

Actual Result

type Foo = void | ObjectId | null | undefined;

Versions

package	version
@typescript-eslint/eslint-plugin	4.13.0
@typescript-eslint/parser	4.13.0
TypeScript	4.1.3
ESLint	7.13.0
node	14.15.0