Ignore LTS Haskell version constraints in hledger-* packages.
Ignore LTS Haskell version constraints in hledger-* packages.

Only hledger-lib and hledger itself are part of LTS. Many other packages
(hledger-ui, hledger-web, ..) are not, however, and these depend on the
latest versions of the base library to compile

bennofs/cabal2nix,Fuuzetsu/cabal2nix