Update travis config to fix releases

Update builds to Xcode 11.3

Fix signing for Notification Extension

Only schedule notifications from the phone app

And play the new ding sound!

Only build the archive instead of exporting too

Prevent artifacts from getting cleaned up

Bump to version 0.5.0

Bump version number and add missing watch icon

Clean up some build settings while I'm at it

Bump version numbers to 0.3.2 (6)

Bump version number to 0.3.1 (5)