create_tcp_dsmr_reader accepts loop=None but always expects a loop. Fixes: #36

[wolph]

No description provided.

[ndokter]

Thanks a lot! Ive build a new package. Hopefully everythings sorted out for you. I havent tested the change myself

[wolph]

The home assistant package has provided an intermediate workaround so it's not an immediate issue anymore but it's a good fix either way :)

Thanks for the merge and the package!