Upgrade Nix flake and deps (#95)

Co-authored-by: patrick-conscriptus[bot] <175414948+patrick-conscriptus[bot]@users.noreply.github.com>
Co-authored-by: Smaug123 <3138005+Smaug123@users.noreply.github.com>

.github/workflows/dotnet.yaml

@@ -23,16 +23,17 @@ jobs:
 
     steps:
     - uses: actions/checkout@v4
-    - name: Setup .NET
-      uses: actions/setup-dotnet@v4
+    - name: Install Nix
+      uses: cachix/install-nix-action@v30
       with:
-        dotnet-version: 7.0.x
+        extra_nix_config: |
+          access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
     - name: Restore dependencies
-      run: dotnet restore
+      run: nix develop --command dotnet restore
     - name: Build
-      run: dotnet build --no-restore --configuration ${{matrix.config}}
+      run: nix develop --command dotnet build --no-restore --configuration ${{matrix.config}}
     - name: Test
-      run: dotnet test --no-build --verbosity normal --configuration ${{matrix.config}}
+      run: nix develop --command dotnet test --no-build --verbosity normal --configuration ${{matrix.config}}
 
   run-app:
     runs-on: ubuntu-latest

flake.lock

@@ -20,11 +20,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1733935885,
-        "narHash": "sha256-xyiHLs6KJ1fxeGmcCxKjJE4yJknVJxbC8Y/ZRYyC8WE=",
+        "lastModified": 1734435836,
+        "narHash": "sha256-kMBQ5PRiFLagltK0sH+08aiNt3zGERC2297iB6vrvlU=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "5a48e3c2e435e95103d56590188cfed7b70e108c",
+        "rev": "4989a246d7a390a859852baddb1013f825435cee",
         "type": "github"
       },
       "original": {