Give id a default value in SyncRegistrationOptions
Give id a default value in SyncRegistrationOptions

Forgot to do this earlier. Update to issue #41.
jkarlin/BackgroundSync,clelland/BackgroundSync,mkruisselbrink/BackgroundSync,wibblymat/BackgroundSync,slightlyoff/BackgroundSync,clelland/BackgroundSync,gerzhan/BackgroundSync,jakearchibald/BackgroundSync,slightlyoff/BackgroundSync