[brace-style] 1tbs not enforced with interfaces

[delventhalz]

What code were you trying to parse?

With the following rule in .eslintrc.json:

{
  "rules": {
    "brace-style": ["error", "1tbs"]
  }
}

This code is correctly flagged as violating 1tbs:

class Foo
{
  bar:
  {
    baz: string
  } }

However, when recreating the same violation with an interface, there will be no lint error:

interface Foo
{
  bar:
  {
    baz: string
  } }

What did you expect to happen?
Both the class and interface to be flagged by ESLint.

What actually happened?
The interface is not flagged.

Versions

package	version
@typescript-eslint/parser	1.13.0
TypeScript	3.4.5
ESLint	6.0.1
node	8.11.4
npm	6.5.0