Revert "zigbee2mqtt: 1.16.2 -> 1.18.2"

This reverts commit 2aab826896.

Likely cause of the unexpected EOF during the latest hydra evaluation
of trunk-combined.

pkgs/servers/zigbee2mqtt/default.nix

@@ -3,14 +3,14 @@ let
   package = (import ./node.nix { inherit pkgs system; }).package;
 in
 package.override rec {
-  version = "1.18.2";
+  version = "1.16.2";
   reconstructLock = true;
 
   src = pkgs.fetchFromGitHub {
     owner = "Koenkk";
     repo = "zigbee2mqtt";
     rev = version;
-    sha256 = "sha256-95RhoJ0aqprzMNOUw9UbLosBwBtQvudKOQaBvBJohn8=";
+    sha256 = "0rpmm4pwm8s4i9fl26ql0czg5kijv42k9wwik7jb3ppi5jzxrakd";
   };
 
   passthru.tests.zigbee2mqtt = nixosTests.zigbee2mqtt;