0.7.9

Bug fixes:

• Raise NotSupportedError when ONVIF subscription is not supported
• Do not add track_method if only on/off supported
• Catch aiohttp RuntimeError("Session is closed")
• Add typing_extensions as requirement

Optimizations:

• Drop ffmpeg and requests as required
• Bump down the minimum version of the RLC-510A

Full Changelog: 0.7.8...0.7.9