Upgrade nixpkgs, ghc923

I ended up deleting miso, and consequently all files under Hero/ and Miso/,
because I couldn't get miso to build with GHC 9.2.

Other things:

- Niv has been wrapped by Biz/Bild/Deps.hs, so I can extend it to my liking.
- Apply-refact is gone because I couldn't get it to build.
- Disabled python stuff.

1 files changed, 1 insertions, 1 deletions

diff --git a/Biz/Bild/Constants.nix b/Biz/Bild/Constants.nix
index 652e022..0ffc85d 100644
--- a/Biz/Bild/Constants.nix
+++ b/Biz/Bild/Constants.nix
@@ -1,4 +1,4 @@
 {
-  ghcCompiler = "ghc8104";
+  ghcCompiler = "ghc923";
   ghcjsCompiler = "ghcjs86";
 }