Miscellaneous:
 - Added "executecommand-button" element to ArenasGUI
 - ArenasGUI: Allow to change parts of the icon (material, amount, nbt...) via conditions
 - ArenasGUI: It's now possible to add entries from the messages file using %<entry name>%#
 - Added descriptions to spawners config file
 - Messages files now use YAML instead of CM2 (auto converts)
 - Improved stability & performance of merging and max-nearby-items system for spawners
 - Added support for DKCoins v5

API changes:
 - ArenaBuilder now throws an ArenaBuildException when the name contains invalid characters
 - Added Arena#getPlayersInTeam(Team)
 - Added Arena#destroyBedNaturally(Team team, Player player)
 - Added Arena#destroyBedNaturally(Team team, String altDisplayName)
 - Added Arena#destroyBedNaturally(Team team, String altDisplayName, Player player)
 - Added Arena#destroyBedNaturally(Team team, Player player, boolean broadcast)
 - Added Arena#destroyBedNaturally(Team team, String altDisplayName, boolean broadcast)
 - Added Arena#destroyBedNaturally(Team team, String altDisplayName, Player player, boolean broadcast)
 - Added Arena#setBlockPlayerPlaced(Block block, boolean newState)
 - Added Arena#boolean isBlockPlayerPlaced(Block block)
 - Added GameAPI#isPlayerBlockMarkingSupported()
 - Added NMSHelper#setSkullTexture(Skull skull, String texture)
 - Added NMSHelper#String getSkullTexture(Skull skull)
 - Added NMSHelper#setSkullTexture(SkullMeta skullMeta, String texture)
 - Added NMSHelper#String getSkullTexture(SkullMeta skullMeta)
 - Added NMSHelper#String getVanillaDeathMessage(Player player
 - Added NMSHelper#setEntityTarget(Entity entity, @Nullable Location target)
 - Added NMSHelper#sendPacket(Player player, Object packet)
 - NMSHelper#setGlowEffect(ItemStack is, boolean glowing) now returns an ItemStack
 - Added NMSHelper#boolean isRunningPaper()
 - Added de.marcely.bedwars.tools.YamlConfigurationDescriptor
 - Moved PlayerBreakBedEvent to ArenaBedBreakEvent
 - Added ArenaBedBreakEvent#isPlayerCaused()
 - Added ArenaBedBreakEvent#getAltDisplayName()
 - Added ArenaBedBreakEvent#setAltDisplayName(String)
 - Renamed ArenaBedBreakEvent.Result#ONLY_BREAK_BLOCK to BREAK_BLOCK
 - Added Arena#getRemainingTeams()
 - Added Arena#getRemainingTeams(Player... ignorePlayers)
 - Renamed DropType#getSpawnDelay to getDropDuration
 - Renamed DropType#setSpawnDelay to setDropDuration
 - Added int Spawner#getCurrentDropDuration()
 - Added List<SpawnerDurationModifier> Spawner#getDropDurationModifiers()
 - Added Spawner#SpawnerDurationModifier addDropDurationModifier(
			String id, Plugin plugin, SpawnerDurationModifier.Operation operation, double value)
 - Added Spawner#boolean removeDropDurationModifier(SpawnerDurationModifier modifier)
 - Added Spawner#@Nullable SpawnerDurationModifier getDropDurationModifier()
 - Added Spawner#getInternalClock()
 - Added Spawner#getRemainingNextDropTime()


Fixed bugs:
 - Fixed possible error when loading spectator items (https://pastebin.com/JFSULypJ, thanks to @NiX)
 - Fixed ArenasGUI layouts default_duo and default_solo not supporting 1.13+ when initialising on 1.13+ (thanks to @ItsPat)
 - Fixed conditions in ArenasGUI not staying when changing layout via the changelayout-button
 - Fixed error when converting from 4.0 https://pastebin.com/QhxrfcTW that caused all holograms to disappear (thanks to @MetallicGoat)
 - Fixed broken beds on 1.8 - 1.12 (thanks to @MetallicGoat)
 - Fixed NoSuchElementException error with empty arena conditions
 - Fixed spawners randomly stopping dropping stuff
 - Fixed error https://pastebin.com/8d8DGzEd
 - Fixed that you can't change the name and lore of the items in the upgrades shop