Pyobo

What's Changed
* Improve Rhea import by cthoyt in https://github.com/biopragmatics/pyobo/pull/168
* Handle CVX obsolete/replaced/placeholder entries by cthoyt in https://github.com/biopragmatics/pyobo/pull/171


**Full Changelog**: https://github.com/biopragmatics/pyobo/compare/v0.10.7...v0.10.8

What's Changed
* Update synonym parsing to handle OMO CURIEs by cthoyt in https://github.com/pyobo/pyobo/pull/166
- handle missing hierarchy in geonames processor
- improve handling of xrefs in ComplexPortal
- Update EC, ComplexPortal, NPASS, and other resources
- FIx the way definition sources get propogated
- Add inverse property writing in OBO flat file export

**Full Changelog**: https://github.com/pyobo/pyobo/compare/v0.10.6...v0.10.7

What's Changed
* Use preferred prefixes when outputting OBO flat files by cthoyt in https://github.com/pyobo/pyobo/pull/164


**Full Changelog**: https://github.com/pyobo/pyobo/compare/v0.10.5...v0.10.6

**Full Changelog**: https://github.com/pyobo/pyobo/compare/v0.10.4...v0.10.5

**Full Changelog**: https://github.com/pyobo/pyobo/compare/v0.10.3...v0.10.4