fix: throw exception for non-existent properties in ChildProcess

Author: SRWieZ

src/ChildProcess.php

@@ -149,9 +149,11 @@ protected function fromRuntimeProcess($process)
         }
 
         foreach ($process['settings'] as $key => $value) {
-            if (property_exists($this, $key)) {
-                $this->{$key} = $value;
+            if (! property_exists($this, $key)) {
+                throw new \RuntimeException("Property {$key} does not exist on ".__CLASS__);
             }
+
+            $this->{$key} = $value;
         }
 
         return $this;