v3.0.0

Changed

• Update README style (@ralphtheninja, @vweevers)
• Upgrade level-js from ~2.1.6 to ~2.2.4 (@ralphtheninja, @Greenkeeper)
• Upgrade memdown from ~1.0.0 to ~2.0.0 (@ralphtheninja, @vweevers, @Greenkeeper)
• Upgrade rimraf from ~2.3.4 to ~2.6.1 (@ralphtheninja, @Greenkeeper)
• Upgrade tape devDependency from ~3.0.0 to ~4.8.0 (@ralphtheninja, @Greenkeeper)
• Simplify npm test (@vweevers)
• Use unique name for each test (@vweevers)
• Use caret for devDependencies (@vweevers)
• Switch to use level-packager (@vweevers)
• Merge identical disk and memory tests (@vweevers)
• Refactor browser code and test with airtap (@vweevers)
• Change LICENSE to LICENSE.md (@vweevers)
• Make arguments optional (@vweevers)
• Dedup code between node and the browser (@vweevers)

Added

• Add node 6 and 8 to Travis (@ralphtheninja)
• Add node 9 and 10 to Travis (@vweevers)
• Add standard (@vweevers)
• Test that db is backed by memdown (@vweevers)
• Test custom store using jsondown (@vweevers)

Removed

• Remove node 0.10 from Travis (@ralphtheninja)
• Remove level dependency (@vweevers)
• Remove levelup dependency (@vweevers)
• Remove leveldown dependency (@vweevers)
• Remove irrelevant encoding option from test (@vweevers)
• Remove testling from package.json (@vweevers)