[no-untyped-public-signature] Requires return type on setters, which cannot have a return type

[glen-84]

Repro

{
  "rules": {
    "@typescript-eslint/no-untyped-public-signature": "error"
  }
}

class Example {
    private _x: string;

    public get x(): string {
        return this._x;
    }

    public set x(x: string) {
        this._x = x;
    }
}

Expected Result

No errors.

Actual Result

Error: Public method has no return type

Additional Info

Related to #1229.

Versions

package	version
@typescript-eslint/eslint-plugin	2.9.0
@typescript-eslint/parser	2.9.0
TypeScript	3.4.5
ESLint	6.7.1
node	12.13.1
npm	6.12.1