Fixes the xcode build and adds stubs for missing classes.

iOS/MonsterCards.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved

@@ -1,32 +1,33 @@
 {
+  "originHash" : "427e2f78970f33b38feca26c7986bebb5f56cf55a388a29b6bade958aaa6607e",
   "pins" : [
     {
-       "identity" : "markdownui",
-       "kind" : "remoteSourceControl",
-       "location" : "https://github.com/gonzalezreal/MarkdownUI",
-       "state" : {
-         "revision" : "5f613358148239d0292c0cef674a3c2314737f9e",
-         "version" : "2.4.1"
-       }
-     },
-     {
-       "identity" : "networkimage",
-       "kind" : "remoteSourceControl",
-       "location" : "https://github.com/gonzalezreal/NetworkImage",
-       "state" : {
-         "revision" : "2849f5323265386e200484b0d0f896e73c3411b9",
-         "version" : "6.0.1"
-       }
-     },
-     {
-       "identity" : "swift-cmark",
-       "kind" : "remoteSourceControl",
-       "location" : "https://github.com/swiftlang/swift-cmark",
-       "state" : {
-         "revision" : "924936d0427cb25a61169739a7660230bffa6ea6",
-         "version" : "0.8.0"
-       }
-     }
-   ],
-   "version" : 2
+      "identity" : "markdownui",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/gonzalezreal/MarkdownUI",
+      "state" : {
+        "revision" : "5f613358148239d0292c0cef674a3c2314737f9e",
+        "version" : "2.4.1"
+      }
+    },
+    {
+      "identity" : "networkimage",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/gonzalezreal/NetworkImage",
+      "state" : {
+        "revision" : "2849f5323265386e200484b0d0f896e73c3411b9",
+        "version" : "6.0.1"
+      }
+    },
+    {
+      "identity" : "swift-cmark",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/swiftlang/swift-cmark",
+      "state" : {
+        "revision" : "08ddb528923cc1a6527e02b7a1aee9e516ca749a",
+        "version" : "0.9.0"
+      }
+    }
+  ],
+  "version" : 3
 }