fix type for ipaddress._BaseNetwork.overlaps (#4124)

Author: JelleZijlstra

stdlib/3/ipaddress.pyi

@@ -86,7 +86,7 @@ class _BaseNetwork(_IPAddressBase, Container[_A], Iterable[_A], Generic[_A]):
     def max_prefixlen(self) -> int: ...
     @property
     def num_addresses(self) -> int: ...
-    def overlaps(self: _T, other: _T) -> bool: ...
+    def overlaps(self, other: _BaseNetwork) -> bool: ...
     @property
     def prefixlen(self) -> int: ...
     if sys.version_info >= (3, 7):

third_party/2/ipaddress.pyi

@@ -86,7 +86,7 @@ class _BaseNetwork(_IPAddressBase, Container[_A], Iterable[_A], Generic[_A]):
     def max_prefixlen(self) -> int: ...
     @property
     def num_addresses(self) -> int: ...
-    def overlaps(self: _T, other: _T) -> bool: ...
+    def overlaps(self, other: _BaseNetwork) -> bool: ...
     @property
     def prefixlen(self) -> int: ...
     if sys.version_info >= (3, 7):