Release 0.3.0

What's Changed

• ✨ Revert to passing organism explicitly by @Zethson in #75
• ✨ Manually save collection by @Zethson in #78
• 💄 Prettify cellxgene guide & refactor CI setup by @falexwolf in #82
• 🐛Fix gene curation by @Zethson in #81
• 🐛Fix uncovered line by @Zethson in #71
• 🐛 Fix ci by @sunnyosun in #73
• 🐛Fix curate throwing an exception on instantiation by @Zethson in #72
• 💚 Install bionty from github in CI by @sunnyosun in #74

Full Changelog: 0.2.6...0.3.0