swiftpm2nix: add support for workspace-state v6

pkgs/development/tools/swiftpm2nix/support.nix

@@ -6,7 +6,7 @@ in rec {
 
   # Derive a pin file from workspace state.
   mkPinFile = workspaceState:
-    assert workspaceState.version == 5;
+    assert workspaceState.version >= 5 && workspaceState.version <= 6;
     json.generate "Package.resolved" {
       version = 1;
       object.pins = map (dep: {

pkgs/development/tools/swiftpm2nix/swiftpm2nix.sh

@@ -12,7 +12,8 @@ if [[ ! -f "$stateFile" ]]; then
   exit 1
 fi
 
-if [[ "$(jq .version $stateFile)" != "5" ]]; then
+stateVersion="$(jq .version $stateFile)"
+if [[ $stateVersion -lt 5 || $stateVersion -gt 6 ]]; then
   echo >&2 "Unsupported $stateFile version"
   exit 1
 fi