Inaccurate changelog

[chopraanmol1]

Released version of material_icons (2.2.1) does not include
Add to_str and to_ary methods to fix avoid errors with Array methods

[Angelmmiguel]

Hello @chopraanmol1,

You're right. It seems I missed that change while I was bundling the gem. I'll create a new version (2.2.2) with that change and update all the changelog files.

Thank you for showing this up.