Update storage to 1.3.2.

[dhermes]

Did this to update the lower bound on the requests dependency (see #3736).

[dhermes]

Blerg! #3770 means a core release would be needed for storage and #3737 means this should probably be a 1.4.x release.

😢

[theacodes]

Ugh, I was worried about this.

We have two options:

1. Keep revving core (& all dependent packages) every time we need a release until I'm done. (My ETA is ~1 month)
2. Cherry-pick into a release branch and release from there.

@lukesneeringer WDYT?

[theacodes]

Alternatively I can hold on off making any more breaking changes in core (basically don't remove any google.cloud packages and cut over depend usage until the very end).

[dhermes]

Cherry-pick into a release branch and release from there.

My preference

[lukesneeringer]

I have no preference. Whichever you two prefer since you are the ones doing the work.