Migrate to Styled Components v4 breaks snapshots

[daraclare]

Hi, thanks for a great library :)

I've updated to Styled Components v4, and while everything seems to be fine, the snapshots have broken, but only the styling. Could this be a jest-styled-components issue? I don't want to update any snapshots until I really understand what the changes are.

I've included an image below — a lot of the changes seem to be to class names i.e. from c1 to c0, but there is also removed styles which appear further down, see attached. Anyone know why this is happening? Any advice would be much appreciated!

[daraclare]

Is this related to #191 ?

[quantizor]

Sometimes major versions of styled-components include changes to how and when we generate dynamic styles. As long the styles are all present in the revised snapshots (perhaps grouped differently), I wouldn't worry about it.