update datetime.utcnow() to use UTC timezone-aware object (#302)

livekit-api/livekit/api/access_token.py

@@ -42,7 +42,7 @@ class VideoGrants:
     can_publish_data: bool = True
 
     # TrackSource types that a participant may publish.
-    # When set, it supercedes CanPublish. Only sources explicitly set here can be
+    # When set, it supersedes CanPublish. Only sources explicitly set here can be
     # published
     can_publish_sources: List[str] = dataclasses.field(default_factory=list)
 
@@ -154,9 +154,9 @@ def to_jwt(self) -> str:
             {
                 "sub": self.identity,
                 "iss": self.api_key,
-                "nbf": calendar.timegm(datetime.datetime.utcnow().utctimetuple()),
+                "nbf": calendar.timegm(datetime.datetime.now(datetime.timezone.utc).utctimetuple()),
                 "exp": calendar.timegm(
-                    (datetime.datetime.utcnow() + self.ttl).utctimetuple()
+                    (datetime.datetime.now(datetime.timezone.utc) + self.ttl).utctimetuple()
                 ),
             }
         )

livekit-rtc/livekit/rtc/participant.py

@@ -301,7 +301,7 @@ def register_rpc_method(
         Establishes the participant as a receiver for calls of the specified RPC method.
         Can be used either as a decorator or a regular method.
 
-        The handler will recieve one argument of type `RpcInvocationData` and should return a string response which will be forwarded back to the caller.
+        The handler will receive one argument of type `RpcInvocationData` and should return a string response which will be forwarded back to the caller.
 
         The handler may be synchronous or asynchronous.
 

livekit-rtc/livekit/rtc/video_frame.py

@@ -218,7 +218,7 @@ def _get_plane_length(
     type: proto_video.VideoBufferType.ValueType, width: int, height: int
 ) -> int:
     """
-    Return the size in bytes of a participar video buffer type based on its size (This ignore the strides)
+    Return the size in bytes of a participant video buffer type based on its size (This ignores the strides)
     """
     if type in [
         proto_video.VideoBufferType.ARGB,