Handle the out of Memory error by counting subsequent timeouts - keep alive - Implement ConnectionError

[jakob1911]

Hello OnFreund,

i tested a few things regarding the "out of Memory error" home-assistant/core#119138 over the last weeks, just right before you updated your repository -- in fact i came a bit late with this now :)

I don´t know if my changes would fit your standard. But in fact it solves the problem with out of memory in my case compleatly.
(i´m using pyrisco with HomeAssistant in local) !

• Created parameter "max_timeout_keep_alive_subseq" in pyrisco
  --> If a "Timeout CLOCK" happens 3 times subseqently, i´m raising an error "ConnectionError"
  In my test together with HomeAssistant Integration i checking for the error the same way you do for "ConnectionResetError" (init_.py) and starting a reload of the Integration when "ConnectionError" is raised by pyrisco.

I would be happy if you can take parts of my changes for everyone´s needs.

Best regards

Jakob