v2.3.0

• Added undocumented isEqual escape hatch for more aggressive reference equality
• Fixed bug where non integer properties of an array were being removed
• Updated docs on extending update to have an $auto and $autoArray command

v2.2.3

• Added support for objects created via Object.create(null)

v2.2.2

• Updated README to include $unset
• Added Autovivification section in README

v2.2.1

• Fixed $unset to unset multiple properties
• Better support for referential equality on $merge

v2.2.0

• Add $unset directive

v2.1.2

• Add LICENSE file (the license was always MIT which was always visible in the package.json file)

v2.1.1

• Fix bug with nibling directives

v2.1.0

• Update README to match react-addons-update
• Add support for node <= 4
• Add support for Symbols
• Better invariants for the spec object

v2.0.0

preserve referential equality when possible

v1.0.0

initial commit