Add prepareDependencies to Store.init

[stephencelis]

Seems useful to have Store mirror TestStore here.

I've also updated all our tests to prefer this initializer, as it's a bit less noisy for declaring upfront dependencies.

[acosmicflamingo]

Oh this is nice; can't wait to clean up some of my tests using this new closure :)

[stephencelis]

@acosmicflamingo This helper was actually introduced to TestStore awhile back! This PR just updates our tests to actually use it, and introduces the corresponding initializer on Store, which can be helpful to configure certain live dependencies at the root of your application.

[acosmicflamingo]

@acosmicflamingo This helper was actually introduced to TestStore awhile back! This PR just updates our tests to actually use it, and introduces the corresponding initializer on Store, which can be helpful to configure certain live dependencies at the root of your application.

Oh neat! Perhaps that was merged before I signed up to get email notifications anytime anything happens in this repo like a stalker ;)