v3.0.0

This is the official release of v3.0.0 👏

Major changes (Since v3.0.0-beta.1):

• Improve Map and Slice to support scalar elements (c97eada)
• Add EachMap and EachSlice (6de4da4)
• Use any instead of interface{} (72cd271)
• Improve error messages (bb82618)