Flow types about polished

[mxstbr]

Hmm, haven't thought about it. We probably won't use it in the code itself but I wouldn't mind adding a libdef for others to use! /cc @styled-components/typers

[relekang]

Why not use it in the code? I haven't looked that much in this repo yet. I have time to do a PR for this tomorrow.

[mxstbr]

Because there isn't much code that we use throughout the codebase, almost every function is an external API, so flowtypes within the codebase would be pretty useless

[relekang]

I think there are a few benefits:

• It is easier to keep the types up to date, we test that the types actually work if we have @flow our test files.
• Making sure the data in the tests is still applicable.
• It is much easier to iron out the enhancement of exporting of types in a smaller repo like this than the styled-components repo 🙂

[guzart]

That is precisely why I was asking, I was about to start working on a PR when I thought it would be nice to have flow type support form the start.

[mxstbr]

Okay, I'm convinced, sounds good to me! Feel free to ahead with a PR!

[guzart]

Too bad I can't help with this, my flow xp is very low. Looking forward to learn from the commit tho =D