Track nixpkgs-unstable

Use unleash-client-haskell-core-0.10.0.

Refactor Cabal file.

flake.nix

@@ -6,9 +6,8 @@
       flake = false;
     };
     flake-utils.url = "github:numtide/flake-utils";
-    nixpkgs.url = "github:nixos/nixpkgs/nixos-23.05";
-    unleash-client-haskell-core.url =
-      "github:finn-no/unleash-client-haskell-core?ref=0.9.0";
+    nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
+    unleash-client-haskell-core.url = "github:finn-no/unleash-client-haskell-core?ref=0.10.0";
   };
   outputs =
     { self, nixpkgs, flake-compat, flake-utils, unleash-client-haskell-core }:

unleash-client-haskell.cabal

@@ -25,8 +25,6 @@ extra-doc-files: CHANGELOG.md
 extra-source-files: README.md
 
 common all
-    build-depends:
-        base >=4.7 && <5,
     default-extensions:
         BlockArguments
         DataKinds
@@ -64,25 +62,27 @@ library
         Paths_unleash_client_haskell
     hs-source-dirs: src
     build-depends:
-        aeson >= 2.0.3 && < 2.1,
-        containers >= 0.6.5 && < 0.7,
+        aeson >= 2.0.3 && < 2.2,
+        base >= 4.7 && < 5,
+        containers >= 0.6.4 && < 0.7,
+        mtl >= 2.2.2 && < 2.3,
+        text >= 1.2.5 && < 2.1,
+        time >= 1.9.3 && < 1.13,
         http-client-tls >= 0.3.6 && < 0.4,
         http-media >= 0.8.0 && < 0.9,
-        mtl >= 2.2.2 && < 2.3,
         servant >= 0.19.1 && < 0.20,
         servant-client >= 0.19 && < 0.20,
-        text >= 1.2.5 && < 1.3,
-        time >= 1.11.1 && < 1.12,
-        unleash-client-haskell-core >= 0.9.0 && < 0.10,
+        unleash-client-haskell-core >= 0.8.7 && < 0.11,
 
 executable example
     import: all
     main-is: Main.hs
     hs-source-dirs: example
     build-depends:
+        unliftio >= 0.2.23 && < 0.3,
+        base,
         mtl,
         servant-client,
         text,
         unleash-client-haskell,
         unleash-client-haskell-core,
-        unliftio >= 0.2.24 && < 0.3,