nix update flake and finish keyboard handling

src/terminfo.zig

@@ -6,7 +6,7 @@ const io = std.io;
 const Self = @This();
 
 pub fn init(allocator: mem.Allocator) !Self {
-    const result = try std.ChildProcess.run(.{
+    const result = try std.process.Child.run(.{
         .allocator = allocator,
         .argv = &[_][]const u8{ "infocmp", "-x" },
     });