Hang closing brackets

Hey everyone,

Thanks for developing this tool! I'm trying to use in a project where the code style is to hang closing parenthesis. That's the E133 rule from `pep8`, that can be enabled with the `--hang-closing` option . For instance, we prefer:

```py
y = {
'a': 1,
'b': 2,
'c': 3,
'd': 4,
}
```

over

```py
y = {
'a': 1,
'b': 2,
'c': 3,
'd': 4,
}
```

I'm trying to set up `yapf` to enforce this, but it seems to always dedent the closing brackets... I thought setting `align_closing_bracket_with_visual_indent` to `true` was precisely made for this, but it doesn't seem to change anything...

Am I doing something wrong? Can I make `yapf` enforce hanging closing brackets? Thanks in advance!