v6.0.0

If you are upgrading: please see UPGRADING.md.

Changed

• Breaking: bump abstract-leveldown, encoding-down, levelup (60bd660) (Vincent Weevers)
• Breaking: hide private properties with Symbol (1f9d550) (Vincent Weevers)
• Refactor: use addRestOptions() for iterator (717066e) (Vincent Weevers)
• Modernize syntax and bump standard (0bd41cc) (Vincent Weevers)

Added

• Add db.getMany(keys) (#107) (0ff2b68) (Vincent Weevers)
• Add manifest (Level/community#83) (f7ee1e3) (Vincent Weevers)
• Clarify scope of keys in README examples (58a628a) (Vincent Weevers)

Removed

• Breaking: drop Node.js 6 and 8 (ab713d1) (Vincent Weevers).