[bindings] fix signatures in pyi files

src/Base/Persistence.pyi

@@ -1,4 +1,6 @@
-# SPDX-License-Identifier: LGPL-2.1-or-later
+# SPDX-License: LGPL-2.1-or-later
+
+from __future__ import annotations
 
 from Metadata import constmethod
 from BaseClass import BaseClass
@@ -21,7 +23,7 @@ class Persistence(BaseClass):
     """Memory size of the object in bytes."""
 
     @constmethod
-    def dumpContent(self, *, Compression: int = 3) -> bytearray:
+    def dumpContent(self, Compression: int = 3) -> bytearray:
         """
         dumpContent(Compression=3) -> bytearray
 
@@ -33,7 +35,7 @@ class Persistence(BaseClass):
         """
         ...
 
-    def restoreContent(self, obj: object) -> None:
+    def restoreContent(self, obj: object, /) -> None:
         # TODO: Starting with Python 3.12, collections.abc.Buffer can be used for type hinting
         """
         restoreContent(obj) -> None