Featureful update and /dragonrespawn command

Overview

A long-awaited feature has been added to DragonEggDrop through a pull request (thank you @Photon-GitHub) and later improved by myself, I'm sure most will appreciate this functionality. That being said, it is worth noting that before using this build, you MUST update your version of CraftBukkit / Spigot to the latest 1.13.2 build. This version of DragonEggDrop utilizes some of the newer changes in the server jar, therefore errors will be thrown in your console on dragon spawn if you do not update.

! IMPORTANT
This version will not support Minecraft 1.9.x - 1.12.x. If you are looking for the 1.9.x - 1.12.x version, please see release 1.5.0-legacy. Upon the coming of 2019, the legacy branch and builds will be unsupported entirely. At which point I ask you to please consider updating your server.

Again, this build will only work on more recent versions of Spigot 1.13.2. It does not support Spigot 1.13 - 1.13.1. Please consider updating your server before running this build.

Changelog

• Added a /dragonrespawn command to better control how the respawn process works
  • /dragonrespawn <stop|interrupt|cancel> [world] will cancel any current respawn countdown either in the world in which the command is executed, or the specified world
  • /dragonrespawn <start> [time] [template] [world] will start a new respawn countdown for x amount of time (defaults to 5m) with the specified template (defaults to a random template) in the given world (defaults to the world in which the command is executed)
  • /dragonrespawn template get [world] will check which template will be spawned for the current respawn countdown
  • /dragonrespawn template set <template> [world] will set the next dragon to be spawned for the current respawn countdown
  • All of these commands have tab completion to make better sense of it all if you are confused
• Command tab completion will now remove any suggestions that no longer make sense (i.e. /dragontemplate st will now only suggest stop instead of all 5 options)
• Item loot parsing is now MUCH more featureful. Far more options are available. See below for an example of all possible options (#14)
• Update the version checker to that used in VeinMiner. More information is now provided
• Dragon templates are now determined when the respawn countdown starts rather than when it finishes
• Dragon egg loot should now be more consistent in the end (it will be properly named)
• If the Particles.type configuration option is unknown, the plugin will now default to FLAME instead of shutting down entirely
• Dropped support for any Minecraft version lower than 1.13.2
• Miscellaneous formatting and code cleanup throughout the entire project

New Item Parsing Options

loot:
  '1':
    weight: 1.0
    type: stick
    damage: 1
    amount: 1
    display-name: '&bExample Item'
    lore:
    - '&6Configure me'
    - '&6to any item'
    enchantments:
      unbreaking: 1
    banner-patterns:
      bricks: red
      bri: purple
    book-data:
      author: 2008Choco
      title: The Best Book Ever!
      generation: original
      pages:
      - "This is the first page of the book. Turn the page for an awesome surprise!"
      - "SURPRISE!"
    knowledge-book-recipes:
    - "minecraft:crafting_table"
    leather-color:
      r: 255
      g: 0
      b: 255
    potion:
      color:
        r: 255
        g: 255
        b: 255
      base:
        potion-type: speed
        extended: true
        upgraded: false
      custom-effects:
        '1':
          effect: speed
          duration: 600
          amplifier: 1
          ambient: true
          particles: false
          icon: false
        '2':
          effect: strength
          duration: 300
          amplifier: 2
          ambient: false
          particles: true
          icon: true
    skull-owner: 2008Choco
    fish-bucket-data:
      pattern: spotty
      pattern-color: red
      body-color: black