Rename `Client.send_update()` -> `.update_nowait()`

piker/clearing/_client.py

@@ -82,7 +82,7 @@ class OrderBook(Struct):
         log.warning('USE `.send_nowait()` instead!')
         return self.send_nowait(msg)
 
-    def send_update(
+    def update_nowait(
         self,
 
         uuid: str,
@@ -95,6 +95,14 @@ class OrderBook(Struct):
         self._to_ems.send_nowait(msg)
         return cmd
 
+    # TODO: async meth for this!
+    # def update(
+    #     self,
+    #     uuid: str,
+    #     **data: dict,
+    # ) -> dict:
+    #     ...
+
     def cancel_nowait(
         self,
         uuid: str,