0.7.0

* Unified empty return values to always use null
* Deprecated placeholder arguments
* Added PHP 7.1 support, dropped 5.6

0.6.1

* Allow empty delimiter in explode

0.6.0

* Add functions: fromPairs, toPairs

Remove separate indexed collection functions

* Fix each callback parameters

* Deprecate separate multi parameter basic collection functions.

* Restore basic collection function parameters.
* Include inner functions in the main library.
* Improvements and fixes to documentation and tests.

Major changes in 0.3:

* Documentation added
* Separate multi parameter versions of basic collection functions

More functions, fixed placeholder support

Version 0.1.0

First release