v4.0.0

Changed

• Breaking: upgrade to latest Level modules (#20) (17d03fb) (@vweevers)
• Move repository from @substack to @Level (b43e233) (@substack, @vweevers)
• Switch to standard code style (3f4a8fb) (@vweevers)

Added

• Add subleveldown test (#20) (c9bb2af) (@vweevers)

Removed

• Breaking: Drop level-sublevel support (#20) (77b60ef) (@vweevers). In preference of subleveldown.
• Breaking: Drop node < 8 (#20) (5e0e7f5) (@vweevers)