Switch over CFNumberType enum
Switch over CFNumberType enum

Once, this wasn't imported as an enum type, but it is now!

[Thanks @zwaldowski.](https://github.com/bignerdranch/Freddy/pull/152/files/8e1e0626215d3c2a689619199020d4429e280c5f#r61319108)

bignerdranch/Freddy,bignerdranch/Freddy,pbardea/Freddy,bignerdranch/Freddy,pbardea/Freddy,pbardea/Freddy,bignerdranch/Freddy