fix(barrel): alphabetized barrel exports

[phillipgreenii]

Fixes #582

[Brocco]

Looks good, can you please rebase this on top of master and squash/fixup the commits to a single commit w/ the message:

fix(barrel): alphabetize barrel exports

Once done, will merge, this looks good!

[phillipgreenii]

Updated

[googlebot]

We found a Contributor License Agreement for you (the sender of this pull request) and all commit authors, but as best as we can tell these commits were authored by someone else. If that's the case, please add them to this pull request and have them confirm that they're okay with these commits being contributed to Google. If we're mistaken and you did author these commits, just reply here to confirm.

[googlebot]

CLAs look good, thanks!

[phillipgreenii]

@Brocco ping; i have rebased this, can it be merged?

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