Merge branch 'issue_22' into 'master'

Upgrade psutil

See merge request !9

agent.py

@@ -85,7 +85,7 @@ class SerialLineReceiver(SerialLineReceiverBase):
                 "swap": dict(psutil.swap_memory()._asdict()),
                 "uptime": {"seconds": uptime.uptime()},
                 "disk": disk_usage,
-                "user": {"count": len(psutil.get_users())}}
+                "user": {"count": len(psutil.users())}}
         self.send_response(response='status', args=args)
         logger.debug("send_status finished")
 

requirements.txt

 Twisted==13.2.0
 pyserial==2.7
-psutil==1.2.1
+psutil==5.4.8
 uptime==3.0.1
 netifaces==0.10.4
 netaddr==0.7.12