v2.2.0

Update README.md

v2.1.0

• Update orderBy() method

v2.0.0

• Update groupBy() method

v1.1.2

• Optimize orderBy() method

v1.1.1

• Update composer.json

v1.1.0

• Add static make() method

v1.0.3

• Increase test coverage to 100%.

v1.0.2

• Fix code style as suggested by Scrutinizer.
• Add test cases to AssociativeArrayTest.php

v1.0.1

• Create .travis.yml
• Update composer.json
• Update readme.md

v1.0.0

Initial version