v6.0.1

Since this version we can deal with immutable data by using new method stabilize.

We also added isUndefined method, while the method isDef has been removed.

The following methods have been removed:

• strtolower
• strtoupper
• min
• max
• unique
• contains
• first
• last
• getIndex
• getLastIndex
• sort
• shuffle
• pick
• empty
• copies
• clone

The methods for array manipulation are available after stabilizing the array instances.