Sunken Treasure, Effects Extender, ParallelItems, CustomTrees, ParallelBot, WorldGuard, and more!

This update adds many new features to ParallelUtils. This could probably be a major release but I'm saving v2.0 for something else.

Features:

• Convert Gamemode4's Sunken Treasure to a plugin
• Add effects extender to stack potion effects
• Add Enhanced Fertilizer (AOE Bonemeal)
• Add coral, warped, crimson, mushroom, and random custom trees with Fractal Forest
• List the number of votes remaining to have a Vote Party in ParallelBot
• Add Baguette 🥖
• Add allow-trapdoor custom WorldGuard flag

Improvements:

• Update development instructions
• Replace deprecated API calls
• Bump version