Permissions (copied from plugin.yml) :

permissions:
  simplespawners.*:
    default : op
    children:
      simplespawners.cmd.* : true
      simplespawners.interact.changespawner : true
      simplespawners.interact.nofees : true
      simplespawners.mine.* : true

  simplespawners.cmd.*:
    default : op
    children:
      simplespawners.cmd.give : true
      simplespawners.cmd.reload : true

  simplespawners.cmd.reload:
    description : Allows usage of /SimpleSpawners reload

  simplespawners.cmd.give:
    description : Allows usage of /SimpleSpawners give

  simplespawners.interact.changespawner:
    description : Allows to change the Spawned Entity for MobSpawners

  simplespawners.interact.nofees:
    description : Players with this Permission don't have to pay for any Spawner Change

  simplespawners.mine.*:
    default : op
    children:
      simplespawners.mine.natural : true
      simplespawners.mine.custom : true

  simplespawners.mine.natural:
    description : Allows to break Natural Mob Spawners with a Silk Touch Pickaxe

  simplespawners.mine.custom:
    description : Allows to break Natural Mob Spawners with a Silk Touch Pickaxe

  simplespawners.ignoreblacklist:
    description : Allows to set blacklisted Entities to spawners
[/SPOILER ]

[B ] [U ]Configuration: [/U ] [/B ]
[SPOILER= "config.yml" ]
[code=YAML ] #If this is true, mined Spawners drop directly into the Miners Inventory.
#Otherwise, they drop as Item where the Spawner was mined.
DropIntoInventory : false

#Define Costs for Entities, that the Player has to Pay in Order to Change the Spawner to the specified Entity.
#If an Entity has no Price specified, the DEFAULT Entry will be applied
#There are two Formats:
#Making Players pay with Items: <ENTITY> : <MATERIAL>, <AMOUNT>
#Making Players pay with Money (Vault and compatible Economy Plugin needed!): <ENTITY> : <PRICE>
#You may look up all Materials here: #https://hub.spigotmc.org/javadocs/bukkit/org/bukkit/Material.html
#Entities are listed here, but not all are supported by the Plugin: #https://hub.spigotmc.org/javadocs/bukkit/org/bukkit/entity/EntityType.html
#Players with the 'simplespawners.interact.nofees:'-permission won't have to pay anything for every Entity
EntityPrices:
  DEFAULT : GOLD_INGOT, 20     #Default entry applied to all Entites not listed here
  GIANT : DIAMOND_BLOCK, 64     #Changing a Spawner to spawn GIANTS costs 64x Diamond Blocks
  FIREBALL : 20                 #Changing a Spawner to spawn Fireballs costs 20 Economy-Currency - Needs Vault and a compatible Economy Plugin!

#Blacklisted Entities
#Players with the 'simplespawners.ignoreblacklist'-permission ignore this list
#Be careful with that Permission!
EntityBlacklist :
 - PRIMED_TNT
  - ENDER_DRAGON
  - CREEPER
 

# Played when a mined spawner is dropped into the Miners Inventory
SPAWNER_DROPPED_INTO_INV:
  sound : ENTITY_ITEM_PICKUP
  v1 : 1.0
  v2 : 1.0

# Played when the Spawner Type has been changed successfully
SPAWNER_TYPE_CHANGED:
  sound : ENTITY_EXPERIENCE_ORB_PICKUP
  v1 : 1.0
  v2 : 1.0

# Played when a transaction failed
TRANSACTION_ERROR:
  sound : BLOCK_ANVIL_LAND
  v1 : 1.0
  v2 : 0.1
 

# The Lore of Mined Spawner Items
SPAWNER_ITEM_LORE : '§7Spawns : §6 %[0]'

# Sent to a Player when they try to edit a Spawner, that is already being edited by someone else
SPAWNER_GUI_ALREADY_IN_EDIT : §cYou can't edit this spawner, as it is already being
  edited by someone else!

# The Title of the Monster Spawner Change GUI
SPAWNER_GUI_TITLE : §bMonster Spawner

# The Displayname of all 'Buttons'(Items) in the Spawner GUI
SPAWNER_GUI_ITEM_NAME : §6Set spawner type to §b %[0]

# The Price-Text for all Buttons in the Spawner GUI
SPAWNER_GUI_COST : '§6Price : §d %[0]'

# The Price-Text when an Option is Free for all Buttons in the Spawner GUI
SPAWNER_GUI_COST_ISFREE : '§6Price : §bFREE'

# Is displayed when the Players has enough Funds in order to buy the selected Option
SPAWNER_GUI_CAN_BUY : §aClick to Buy!

# Is displayed when the Players has not enough Funds in order to buy the selected Option
SPAWNER_GUI_CANNOT_BUY : §cYou can't afford that!

# The Displayname of the GUI-Item showing the current Spawner Type
SPAWNER_GUI_CURRENT_TYPE_NAME : '§6Current Type : §b %[0]§6!'

# Sent when a Player tries to set a spawner to it's current spawntype
SPAWNER_IS_ALREADY_SAME_TYPE : §cThis is already the current type of the Spawner!

# Sent to the Player when the Purchase of an Option fails because the Players hasn't enough funds
ECO_TRANSACTION_ERR_INSUFFICIENT_FUNDS : §cTransaction failed, you have insufficient
  funds

# Sent to the Player when an unknown Error during a Purchase occurs
ECO_TRANSACTION_UNKNOWN_ERR : §cTransaction failed, an unknown error occurred

# Sent to the Player when an option has been purchased successfully
ECO_TRANSACTION_SUCCESS : §aChanged the Spawner Type successfully!

# Sent to the Player when they use a Feature locked behind a Permission which they don't have
CMD_ERR_NO_PERMISSION : §cYou don't have the Permission to do that.

# Sent when an unknown Playername is specified in a Command
CMD_ERR_UNKNOWN_PLAYER : §cCan't find Player '§6 %[0]§c'!

# Sent to the Player upon using the '/ss reload'-Command
CMD_SS_RELOAD_STARTED : §7Reloading Plugin Configuration ...