bump for release:

Montana Low · Montana Low · commit 96d6f562a5eb · 2022-04-17T10:16:35.000-07:00
diff --git a/pgml/pgml/__init__.py b/pgml/pgml/__init__.py
@@ -1,2 +1,2 @@
 def version():
-    return "0.4.1"
+    return "0.4.2"
