Updated to 1.20.5!

Since the last release, I've opened up a Discord server so you can discuss my mods and get updates when new releases are made available.

This is primarily just a version update, however the following changes have been made:

• The Custom Name feature has been added, resolving #28. This allows you to name your container with a minecraft ID (e.g. minecraft:grass_block) and have it display instead of the container contents (if you wish). Thanks to @Boden-C for their initial work on this one.
• Removed support for recursive shulkers. This was a feature that wasn't requested but I had added in for better compatibility. Since 1.20.5 required a rewrite of all the code and I haven't seen anybody using this feature, it has been removed until requested back.

On the technical side of things, the update to 1.20.5 broke a lot of the underlying code due to their change to the components system.

• Near-total rewrite of item rendering
• Complete rewrite of display item selection (leading to the removal of recursive support)
• Change of internal naming conventions to use 'container' as a more generalised term

I hope you enjoy the changes!