set activity flag on noise / secio (#330)

libp2p/protocols/secure/noise.nim

@@ -422,6 +422,7 @@ method write*(sconn: NoiseConnection, message: seq[byte]): Future[void] {.async.
     outbuf &= besize
     outbuf &= cipher
     await sconn.stream.write(outbuf)
+    sconn.activity = true
 
 method handshake*(p: Noise, conn: Connection, initiator: bool): Future[SecureConn] {.async.} =
   trace "Starting Noise handshake", initiator, peer = $conn

libp2p/protocols/secure/secio.nim

@@ -236,6 +236,7 @@ method write*(sconn: SecioConn, message: seq[byte]) {.async.} =
 
     trace "Writing message", message = msg.shortLog, left, offset
     await sconn.stream.write(msg)
+    sconn.activity = true
 
 proc newSecioConn(conn: Connection,
                   hash: string,

libp2p/protocols/secure/secure.nim

@@ -103,6 +103,7 @@ method readOnce*(s: SecureConn,
 
   if s.buf.data().len() == 0:
     let buf = await s.readMessage()
+    s.activity = true
     if buf.len == 0:
       raise newLPStreamIncompleteError()
     s.buf.add(buf)