Exploring Carthage support.

[jverkoey]

Closes https://github.com/material-components/material-components-ios/issues/75

[jverkoey]

Current output:

> carthage update --use-xcframeworks

*** Cloning motion-animator-objc
*** Cloning material-text-accessibility-ios
*** Cloning motion-interchange-objc
*** Cloning material-internationalization-ios
*** Checking out material-text-accessibility-ios at "v2.0.1"
*** Checking out material-internationalization-ios at "v2.0.1"
*** Checking out motion-animator-objc at "v5.0.0"
*** Checking out motion-interchange-objc at "v4.0.1"
*** xcodebuild output can be found in /var/folders/rb/45yj0ph56lx_mxp_2g3f319h002gv0/T/carthage-xcodebuild.d65C5y.log
*** Building scheme "MDFInternationalization" in Flags.xcworkspace
*** Skipped building material-text-accessibility-ios due to the error:
Dependency "material-text-accessibility-ios" has no shared framework schemes

If you believe this to be an error, please file an issue with the maintainers at https://github.com/material-foundation/material-text-accessibility-ios/issues/new
*** Skipped building motion-animator-objc due to the error:
Dependency "motion-animator-objc" has no shared framework schemes

If you believe this to be an error, please file an issue with the maintainers at https://github.com/material-motion/motion-animator-objc/issues/new
*** Building scheme "MotionInterchange" in MotionInterchange.xcodeproj