* Documentation: Align DocBlock Promise return types

  (#44 by @WyriHaximus)

Update child repos to PSR-4 for git subs-plit

Fugbix typo.

To whom it may concern,

I believe I've stumbled upon an unintentional typographical error in your online documentation. I pray you will find my pull request helpful in rectifying this situation.

Your friend in code,

- Jeff