dhall-bhat is incompatible with Dhall-10

[sjakobi]

$ dhall type --file Either/terms.dhall 
dhall: 
Error: Invalid input

(stdin):6:34:
  |
6 |             λ(Left : a) → < Left = Left | Right : b >
  |                                  ^
unexpected '='
expecting ':', '>', '|', or whitespace

The legacy union-literal syntax has finally been removed. See https://github.com/dhall-lang/dhall-lang/wiki/Migration:-Deprecation-of-old-union-literal-syntax

[FintanH]

Ya, dhall-bhat needs a lot of love ❤️ We don't really have a way of versioning at the moment, but maybe that's fine as long as people pin against git shas. So we could just update to the latest Dhall. What do you think @sellout?