fix: Backsupport to prevent major version bump

Author: NeedleInAJayStack

Sources/GraphQL/Language/AST.swift

@@ -213,8 +213,13 @@ public extension Node {
         return nil
     }
 
+    @available(*, deprecated, message: "Use set(value _: NodeResult?, key _: String)")
+    func set(value: Node?, key: String) {
+        return set(value: value.map { .node($0) }, key: key)
+    }
+
     func set(value _: NodeResult?, key _: String) {
-        print("TODO: Should be implemented on each type!")
+        // This should be overridden by each type on which it should do something
     }
 }