Merge pull request #289 from rolandwalker/hearthstone_no_check

convert hearthstone-eu.rb to sha256 :no_check

Casks/hearthstone-eu.rb

@@ -2,7 +2,7 @@ class HearthstoneEu < Cask
   url 'http://dist.blizzard.com/downloads/hs-installers/a6029a1d625c79252defff3914fb6e67/retail.1/Hearthstone-Setup-enGB.zip'
   homepage 'http://eu.battle.net/hearthstone/en/'
   version 'latest'
-  no_checksum
+  sha256 :no_check
   caskroom_only true
   caveats do
     manual_installer 'Hearthstone-Setup-enGB.app'