Update psalm-baseline.xml

Author: GrahamCampbell

psalm-baseline.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<files psalm-version="4.1.1@16bfbd9224698bd738c665f33039fade2a1a3977">
+<files psalm-version="4.2.1@ea9cb72143b77e7520c52fa37290bd8d8bc88fd9">
   <file src="src/HttpClient/Util/JsonArray.php">
     <MixedArgument occurrences="1">
       <code>\get_debug_type($data)</code>