Update IonicIconSet

Hi there,

I am using the IonicIcon Plugin and noticed that there are a lot of Icons that are missing. As a lot of users are using that Icon Library it would be really awesome to have all of the Icons available.

Just look at the Ionic Website https://ionicons.com/ and you instantly find Icons that are available there but not in the plugin.

Who else is using IonicIcons & would like to see the library updated? :raised_hands:

PS: I already contacted support.