Can't build for iOS using Carthage

[kohlab]

### Expected Behavior

Clean build.

### Actual Behavior

Get this error instead:

*** Skipped building MMSProfileImagePicker due to the error:
Dependency "MMSProfileImagePicker" has no shared framework schemes for any of the platforms: iOS

If you believe this to be an error, please file an issue with the maintainers at https://github.com/miller-ms/MMSProfileImagePicker/issues/new

### Steps to Reproduce

Create a Cartfile that includes the line:
github "miller-ms/MMSProfileImagePicker" ~> 1.4.0

Run:
carthage update --platform iOS --no-use-binaries

### ....*

I haven't done this before myself, but it looks like a quick fix.