Make a new release to allow versions of fastavro>1.6.0

The latest release (1.7.2) is restrcting fastavro~=1.5.1, which translates to >=1.5.1 , <1.6.0

Currently in trunk this dependency is loosened to 'fastavro>=1.5.1,<2.0.0'

Could we please have a new release with this change? Any version of fastavro<1.8.2 cannot be used on M-series macs and this is causing some paint for local development as I need to constantly work around it.

Thanks!

[j-svensmark]

Looks like this may have been resolved with the latest release?
https://github.com/ynqa/pandavro/releases/tag/v1.8.0