* Version 0.3.0

+ Data :: <2019-03-10 Sun>
+ Add ::
    - Custom ignore when flatten iterable.

* Version 0.2.0

+ Data :: <2019-02-15 Fri>
+ Add ::
    - flatten in extra.

* Version 0.1.0

+ Data :: <2019-02-06 Wed>
+ Commemorate Version :: First Release.
