Fix crash for unsupported dimension events

[michnovka]

Fixes #143

[nachogarcia]

This fixes a lot of the problems that this integrations has.
It might be nice to log the error, not just pass the catch block.

@anotherjulien Are you still maintaining the project?

[dan-it]

Hello @michnovka! I'm having a similar problem that I think this fix doesn't address (or at least I was unable to install it)

Setup:

1. I didn't configure all my lights in myhome.yaml (I'm using the extension mostly to control my climate)
2. I have some dimmable lights that are not configured.

What happens:
Whenever I see on the bus a message like *1*7*0504## (light at 70%) the messages stop updating.

I solved by simply configuring the lights with "dimmable: true" but I think this behaviour may be related to what you fix here.

Great work anyways!

[michnovka]

@dan-it Yes, I think this is related. What do you mean you were unable to install it?

[dan-it]

I am new to HA so I'm not sure that replacing the contents of homeassistant/custom_components/myhome/light.py and restarting HA is enough. That's what I did and it still has the same issue.