v2.0.0

Changed

• Upgrade readable-stream from ^1.0.33 to ^2.0.5 (@Greenkeeper, @ralphtheninja)
• Upgrade tape devDependency from ^3.5.0 to ^4.4.0 (@Greenkeeper, @ralphtheninja)
• Upgrade through2 devDependency from ^0.6.3 to ^2.0.0 (@Greenkeeper, @ralphtheninja)
• Upgrade leveldown devDependency from ^0.10.4 to ^1.4.1 (@juliangruber)
• Update copyright year to 2017 (@ralphtheninja)
• Update README example using standard (@ralphtheninja)

Added

• Add node 6 to Travis (@Greenkeeper, @juliangruber)
• Add node 7 and 8 to Travis (@ralphtheninja)
• Add Greenkeeper (@ralphtheninja)
• Add standard (@ralphtheninja)
• Test .destroy() during and after iterator.next() (@ralphtheninja)

Removed

• Remove node 0.10, 0.12 and iofs from Travis (@Greenkeeper, @juliangruber)
• Remove encodings (@ralphtheninja)
• Remove Makefile (@ralphtheninja)