Update pyhomematic to 0.1.49

[danielperna84]

Description:

Updating pyhomematic to 0.1.49. This fixes the recent changes about the RSSI-attributes (now both RSSI_DEVICE and RSSI_PEER are supported). Also the component does not fail entirely anymore if a single hub is offline during startup.

Checklist:

• The code change is tested and works locally.
• Local tests pass with tox. Your PR cannot be merged unless tests pass

If the code communicates with devices, web services, or third-party tools:

• New dependencies have been added to the REQUIREMENTS variable (example).
• New or updated dependencies have been added to requirements_all.txt by running script/gen_requirements_all.py.