Version v0.0.4

89eb730 chore(composer): remove php constraint [fixes #12] (Jitendra Adhikari)
925dc6d Test enhancement (peter279k)
026b1a8 fix: array() instead of [] (Jitendra Adhikari)
09943cc build: Travis (Jitendra Adhikari)
50ba0e5 doc: badges are cool (Jitendra Adhikari)

Version 0.0.3

A bigger release than before.

• Fully restructured.
• PHP5.4 polyfills added.

Version 0.0.2

Fix invalid parameters should return null and not empty array.
Add more tests for invalid arguments.

Version 0.0.1

Add array_column polyfill