update yapf to version 0.16.0

[Govinda-Fichtner]

As there is a more recent version of yapf available we can update now.

[asottile]

Another neat feature that was added in pre-commit 0.13 is the ability to replace these mirror repositories with local hooks. We haven't quite decided whether we should deprecate these mirror repositories or not.

The "local" hooks version of yapf would look something like this:

-   repo: local
    hooks:
    -   id: yapf
        name: yapf
        entry: yapf -i
        language: python
        additional_dependencies: ['yapf==0.16.0']
        files: '\.py$'

I'll run the mirroring upgrade script and push that. Thanks for the PR!