add more type annotations

app/src/gen3/connection_g3.py

@@ -1,5 +1,6 @@
 import logging
 # import gc
+from asyncio import StreamReader, StreamWriter
 from async_stream import AsyncStream
 from gen3.talent import Talent
 
@@ -8,12 +9,13 @@ logger = logging.getLogger('conn')
 
 class ConnectionG3(AsyncStream, Talent):
 
-    def __init__(self, reader, writer, addr, remote_stream, server_side: bool,
+    def __init__(self, reader: StreamReader, writer: StreamWriter,
+                 addr, remote_stream: 'ConnectionG3', server_side: bool,
                  id_str=b'') -> None:
         AsyncStream.__init__(self, reader, writer, addr)
         Talent.__init__(self, server_side, id_str)
 
-        self.remoteStream = remote_stream
+        self.remoteStream: 'ConnectionG3' = remote_stream
 
     '''
     Our puplic methods