chore(compat): mypy updates for LegacyVersion

Author: tony

src/libtmux/_compat.py

@@ -100,27 +100,27 @@ def _legacy_cmpkey(version: str) -> LegacyCmpKey:
 
     @functools.total_ordering
     class LegacyVersion:
-        _key = None  # type: Union[CmpKey, LegacyCmpKey]
+        _key: LegacyCmpKey
 
         def __hash__(self) -> int:
             return hash(self._key)
 
-        def __init__(self, version: str) -> None:
+        def __init__(self, version: object) -> None:
             self._version = str(version)
             self._key = _legacy_cmpkey(self._version)
 
         def __str__(self) -> str:
             return self._version
 
-        def __lt__(self, other):
+        def __lt__(self, other: object) -> bool:
             if isinstance(other, str):
                 other = LegacyVersion(other)
             if not isinstance(other, LegacyVersion):
                 return NotImplemented
 
             return self._key < other._key
 
-        def __eq__(self, other) -> bool:
+        def __eq__(self, other: object) -> bool:
             if isinstance(other, str):
                 other = LegacyVersion(other)
             if not isinstance(other, LegacyVersion):
@@ -133,4 +133,4 @@ def __repr__(self) -> str:
 
     LooseVersion = LegacyVersion
 except ImportError:
-    from distutils.version import LooseVersion, Version
+    from distutils.version import LooseVersion, Version  # type: ignore