bug(semantic): references on `MemberExpression` not recorded

```ts
enum Foo { // <- foo creates a scope, just like a namespace
  A        // <- has a symbol (SymbolFlags::EnumMember)
}

// Foo has a reference, but A does not
console.log(Foo.A) 
```

> (edit: it appears playground links are broken. When I go to copy a playground URL for this snippet, it takes me to the playground with the default react component snippet)