Abcvoting

Random profile generation via PR 78 (using prefsampling). Thanks to Simon-Rey

What's Changed
* Sampling via prefsampling by Simon-Rey in https://github.com/martinlackner/abcvoting/pull/78

**Full Changelog**: https://github.com/martinlackner/abcvoting/compare/v2.8.0...v2.9.0

What's Changed
* Clarify docstring about weights by DominikPeters in https://github.com/martinlackner/abcvoting/pull/69
* Updated I/O to use preflibtools by Simon-Rey in https://github.com/martinlackner/abcvoting/pull/73

New Contributors
* Simon-Rey made their first contribution in https://github.com/martinlackner/abcvoting/pull/73

**Full Changelog**: https://github.com/martinlackner/abcvoting/compare/v2.7.1...v2.8.0

fix build config

PRs
* add JOSS badge to README.md by lumbric in https://github.com/martinlackner/abcvoting/pull/60
* Implement EJR+ by DominikPeters in https://github.com/martinlackner/abcvoting/pull/62
* Improve docs for generate by DominikPeters in https://github.com/martinlackner/abcvoting/pull/64
* Improvements to properties by DominikPeters in https://github.com/martinlackner/abcvoting/pull/63
* Implement maximin support method (MMS) by DominikPeters in https://github.com/martinlackner/abcvoting/pull/65
* Implement FJR by DominikPeters in https://github.com/martinlackner/abcvoting/pull/66
* Weighted rules & weighted properties by DominikPeters in https://github.com/martinlackner/abcvoting/pull/68

**Full Changelog**: https://github.com/martinlackner/abcvoting/compare/v2.6.0...v2.7.0

main changes
* add priceability and core property by Florian-Lackner and JKompa in https://github.com/martinlackner/abcvoting/pull/58