v6.0.0

Hi there, bunchee v6 is out! 🚀

Feature

• 🎉 Introduce _<name> private shared module conventions to corss entries shared modules (#600)
• 🎉 Adding bunchee lint command to validate your package.json and build

Breaking Change

• Change bunchee --prepare to bunchee prepare in #598

Besides the feature, it also brought a lots of bug fixes and perf improvements. Try it out to build your npm packages!