review update

Author: mjreno

flopy4/mf6/gwf/__init__.py

@@ -73,10 +73,10 @@ def budget(self):
         block="options", default=None, converter=to_path, inout="fileout"
     )
     dis: Dis = field(converter=convert_grid, block="packages")
-    ic: Ic = field(block="packages", default=None)
-    oc: Oc = field(block="packages", default=None)
-    npf: Npf = field(block="packages", default=None)
-    sto: Sto = field(block="packages", default=None)
+    ic: Ic | None = field(block="packages", default=None)
+    oc: Oc | None = field(block="packages", default=None)
+    npf: Npf | None = field(block="packages", default=None)
+    sto: Sto | None = field(block="packages", default=None)
     chd: list[Chd] = field(block="packages")
     wel: list[Wel] = field(block="packages")
     drn: list[Drn] = field(block="packages")