Update LiteralTextMixin from core:invalid

[gabizou]

Located in: core:invalid

Part of: text

This is part of the upgrade process for Sponge and is likely involving some work and investigation.

Advice and tips include:

• Sometimes things are just a simple method name change
• Might be a new class or field
• Understanding what the original intention of the target code had
• Analyzing whether the functionality achieved by the target class/mixin still exists
• Understanding the new functionality in the new Minecraft version that requires rewriting for the functionality
• The SpongeAPI usage could very well have gone missing out the window if functionality was deemed unnecessary for release