Add chain XP

Changelog.txt

@@ -1,6 +1,8 @@
 Version 2.1.129
     Added new subcommand /mmoxpbar disable - Hides all mcMMO XP bars
     New locale string 'Commands.XPBar.DisableAll'
+    Added Blackstone to Mining experience tables
+    Added Chain to Mining experience tables
 
 Version 2.1.128
     The first rank of Iron Arm for Unarmed now only gives 1.5 bonus damage instead of 4 (other ranks are the same as before)

src/main/resources/experience.yml

@@ -367,6 +367,7 @@ Experience_Values:
         Lily_Of_The_Valley: 150
         Wither_Rose: 500
     Mining:
+        Chain: 100
         Blackstone: 55
         Warped_Nylium: 5
         Crimson_Nylium: 5