Log Message:
lang/dhall: update to dhall-1.42.2

1.42.2

* [Supports standard version \ 
23.1.0](https://github.com/dhall-lang/dhall-lang/releases/tag/v23.1.0)
  * [Allow `Natural` and `Integer` literals in binary \ 
notation](https://github.com/dhall-lang/dhall-haskell/pull/2540)
* Fix macOS build \ 
[[#2561](https://github.com/dhall-lang/dhall-haskell/pull/2561)] / \ 
[[#2586](https://github.com/dhall-lang/dhall-haskell/pull/2586)]
* [`dhall to-directory-tree`: Fix support for empty \ 
`Map`s](https://github.com/dhall-lang/dhall-haskell/pull/2609)
* [`Dhall.TH`: Improve recompilation \ 
checking](https://github.com/dhall-lang/dhall-haskell/pull/2620)
  * `Dhall.TH` utilities now use `addDependentFile` internally so that GHC will \ 
recompile if any Dhall dependencies change
* Performance improvements
  * Optimize `Natural/fold`: \ 
[[#2585](https://github.com/dhall-lang/dhall-haskell/pull/2585)] / \ 
[[#2596](https://github.com/dhall-lang/dhall-haskell/pull/2596)]
  * [Improve `Dhall.Map.traverseWithKey` \ 
performance](https://github.com/dhall-lang/dhall-haskell/pull/2589)
    * The fold will now short-circuit if it reaches a fixed point
  * [#2611](https://github.com/dhall-lang/dhall-haskell/pull/2611)
* Fixes and improvements to test suite
  * [#2593](https://github.com/dhall-lang/dhall-haskell/pull/2593)
* Fixes and improvements to haddocks
  * [#2546](https://github.com/dhall-lang/dhall-haskell/pull/2546)
* Fixes and improvements to code formatting
  * [#2608](https://github.com/dhall-lang/dhall-haskell/pull/2608)