v0.6.8

What's Changed

• fix the bug in hierarchical search space (#248); make dependency on lgbm and xgboost optional (#252) by @sonichi in #250
• Add conda forge badge by @MichalChromcak in #251

New Contributors

• @MichalChromcak made their first contribution in #251

Full Changelog: v0.6.7...v0.6.8