Various improvements to dateutil.rrule stubs (#10009)

stubs/python-dateutil/dateutil/rrule.pyi

@@ -1,7 +1,6 @@
 import datetime
 from _typeshed import Incomplete
-from collections.abc import Iterable, Iterator
-from typing import Any
+from collections.abc import Iterable, Iterator, Sequence
 from typing_extensions import TypeAlias
 
 from ._common import weekday as weekdaybase
@@ -59,23 +58,25 @@ class rrule(rrulebase):
     ) -> None: ...
     def replace(self, **kwargs): ...
 
+_RRule: TypeAlias = rrule
+
 class _iterinfo:
-    rrule: Any = ...
-    def __init__(self, rrule) -> None: ...
-    yearlen: int = ...
-    nextyearlen: int = ...
-    yearordinal: int = ...
-    yearweekday: int = ...
-    mmask: Any = ...
-    mdaymask: Any = ...
-    nmdaymask: Any = ...
-    wdaymask: Any = ...
-    mrange: Any = ...
-    wnomask: Any = ...
-    nwdaymask: Any = ...
-    eastermask: Any = ...
-    lastyear: int = ...
-    lastmonth: int = ...
+    rrule: _RRule
+    def __init__(self, rrule: _RRule) -> None: ...
+    yearlen: int | None
+    nextyearlen: int | None
+    yearordinal: int | None
+    yearweekday: int | None
+    mmask: Sequence[int] | None
+    mdaymask: Sequence[int] | None
+    nmdaymask: Sequence[int] | None
+    wdaymask: Sequence[int] | None
+    mrange: Sequence[int] | None
+    wnomask: Sequence[int] | None
+    nwdaymask: Sequence[int] | None
+    eastermask: Sequence[int] | None
+    lastyear: int | None
+    lastmonth: int | None
     def rebuild(self, year, month): ...
     def ydayset(self, year, month, day): ...
     def mdayset(self, year, month, day): ...
@@ -85,20 +86,18 @@ class _iterinfo:
     def mtimeset(self, hour, minute, second): ...
     def stimeset(self, hour, minute, second): ...
 
-_RRule: TypeAlias = rrule
-
 class rruleset(rrulebase):
     class _genitem:
-        dt: Any = ...
-        genlist: Any = ...
-        gen: Any = ...
+        dt: Incomplete
+        genlist: list[Incomplete]
+        gen: Incomplete
         def __init__(self, genlist, gen) -> None: ...
-        def __next__(self): ...
-        next: Any = ...
-        def __lt__(self, other): ...
-        def __gt__(self, other): ...
-        def __eq__(self, other): ...
-        def __ne__(self, other): ...
+        def __next__(self) -> None: ...
+        next = __next__
+        def __lt__(self, other) -> bool: ...
+        def __gt__(self, other) -> bool: ...
+        def __eq__(self, other) -> bool: ...
+        def __ne__(self, other) -> bool: ...
 
     def __init__(self, cache: bool = False) -> None: ...
     def rrule(self, rrule: _RRule): ...