Support for Sanity studio V5

[Adstokoe19]

Dependencies need updating to support v5.

[waspeer]

Thanks for bringing this to my attention! This should be an easy change, I'll keep you updated through this issue.

[marijoo]

Any progress on this so far?

[waspeer]

v3.0.0 is now released with full Sanity Studio v5 support! Upgrade to sanity-plugin-iconify@^3.0.0 and you should be good to go. Let me know if you run into anything.