fix: typing hit

Author: rexzhang

asgi_webdav/constants.py

@@ -356,7 +356,7 @@ def __init__(self, timestamp: float | None = None):
             self.data = datetime.fromtimestamp(timestamp, tz=timezone.utc)
 
     @classmethod
-    def from_microseconds(cls, timestamp: float):
+    def from_microseconds(cls, timestamp: float) -> DAVTime:
         return cls(timestamp / 1_000_000)
 
     @cached_property