Vladislav Zavialov authored Oct 02, 2021 and Marge Bot committed Oct 04, 2021

The EpaAnnCO we were using contained an Anchor instead of EpaLocation,
making it harder to work with.

At the same time, using EpaLocation by itself isn't possible either,
as we may have tokens without location information.

Hence the new data type:
	data TokenLocation = NoTokenLoc
	                   | TokenLoc !EpaLocation