Add -t shorthand for --targets

[aescay]

Fixes #1281

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[drewbanin]

@cla-bot check

Thanks for this PR - looks great :)

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The cla-bot has been summoned, and re-checked this pull request!

[drewbanin]

@beckjake looks like this redshift error is some sort of network blip - you cool with merging this? :)

[beckjake]

Yeah, looks fine to me!