PillButtonBar doesn't accept a list of 2 items🐛

[LordOfTheNeverThere]

Describe the bug
It's not really a bug just a normal mistake. A PillButtonBar will need at least two items otherwise an assertion will be generated. As it states in the image of your code bellow, in the comments.
But in fact you have to put 3 items for it to work

To Reproduce
Steps to reproduce the behavior:

Make a PillButtonBar, have two items on it,
An assertion will fire.

Expected behavior
Allow a 2 items list, as stated in the comments of the code

Screenshots

It should be items.lenght>=2 instead of items.lenght>2

Nice Work!
Love the Design! Keep up the Work!