CannonsRPG

Added cannonsrpg/kill source, here an example, you can configurate cooldown from cooldowns.kill_leveler, basically same format as the others, you can check the updated default config files for more clarity or just make them regenerate:

  killing_player:
    type: cannonsrpg/kill
    entity_type: PLAYER # these are all valid: https://hub.spigotmc.org/javadocs/bukkit/org/bukkit/entity/EntityType.html
    xp: 200
    display_name: "Kill players with Cannons"
    menu_item:
      material: diamond_sword

Fixed requiring always at least one skill source of each type
Fixed skill source being only available for Gunnery skill

Full Changelog: 1.0.2...1.0.3