Merge pull request #2263 from himself65/fix

fix: add `undefined` type in key map

Author: mrlubos

packages/custom-client/src/core/params.ts

@@ -31,7 +31,7 @@ type KeyMap = Map<
   string,
   {
     in: Slot;
-    map?: string;
+    map?: string | undefined;
   }
 >;