Update flake.nix to nixos-22.05

Author: Grumbel

flake.lock

@@ -24,14 +24,14 @@
   description = "A 2D platform game featuring Tux the penguin";
 
   inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/nixos-21.11";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-22.05";
     flake-utils.url = "github:numtide/flake-utils";
 
-    tinycmmc.url = "gitlab:grumbel/cmake-modules";
+    tinycmmc.url = "github:grumbel/tinycmmc";
     tinycmmc.inputs.nixpkgs.follows = "nixpkgs";
     tinycmmc.inputs.flake-utils.follows = "flake-utils";
 
-    sexpcpp.url = "gitlab:lispparser/sexp-cpp";
+    sexpcpp.url = "github:lispparser/sexp-cpp";
     sexpcpp.inputs.nixpkgs.follows = "nixpkgs";
     sexpcpp.inputs.flake-utils.follows = "flake-utils";
     sexpcpp.inputs.tinycmmc.follows = "tinycmmc";