[no-unused-vars] (v4-alpha.1) False positive when in an interface

[eamodio]

Repro

{
  "rules": {
    "@typescript-eslint/no-unused-vars": [
		"warn",
		{
			"args": "after-used",
			"argsIgnorePattern": "^_",
			"ignoreRestSiblings": true,
			"varsIgnorePattern": "^_$"
		}
	]
  }
}

export interface Event<T> {
	(listener: (e: T) => any, thisArgs?: any, disposables?: Disposable[]): Disposable;
}

Expected Result

No errors

Actual Result

  11:3   warning  'listener' is defined but never used. Allowed unused args must match /^_/u     @typescript-eslint/no-unused-vars
  11:28  warning  'thisArgs' is defined but never used. Allowed unused args must match /^_/u     @typescript-eslint/no-unused-vars
  11:44  warning  'disposables' is defined but never used. Allowed unused args must match /^_/u  @typescript-eslint/no-unused-vars

Additional Info

Versions

package	version
@typescript-eslint/eslint-plugin	4.0.0-alpha.1
@typescript-eslint/parser	4.0.0-alpha.1
TypeScript	3.9.7
ESLint	7.5.0
node	12.16.2
npm	6.14.4