v2.0.0

Breaking updates

• Drop contexts and instance caching. (fd061db)
• Refactor unique object handling (a3cfc4d)
• Refactor copy behavior. (a57ee9f)

Fixes and minor changes

• Update examples and notebook. (244c243)
• Update code style. (3ef6c35)
• Fix pypi publish action. (394e7a0)