Use `modifyError` from the library
Clarification and motivation
In !107 (merged) I'm adding our custom modifyError
function working on ExceptT
, however in the recent mtl
it is present right in the library, we should use it.
We can do this after we switch to the recent LTS.
Acceptance criteria
-
modifyError
function declaration is removed in favor of the same function frommtl
.