TypeOf doesn't extract nested interfaces

[DylanRJohnston]

import * as T from 'io-ts'

type Foo = T.TypeOf<typeof $Foo>
const $Foo = T.interface({
    foo1: T.number,
    foo2: T.string
});

type Bar = T.TypeOf<typeof $Bar>
const $Bar = T.interface({
    bar1: T.string,
    bar2: $Foo
})

type Bar = {
    bar1: string;
    bar2: T.InterfaceOf<{
        foo1: T.Type<number>;
        foo2: T.Type<string>;
    }>;
}

[DylanRJohnston]

Just noticed the upstream issue. Sorry for not checking first.