Bump version to 3.6.0

Author: rafalcymerys

lib/spree_braintree_vzero/version.rb

@@ -9,8 +9,8 @@ def version
 
   module VERSION
     MAJOR = 3
-    MINOR = 5
-    TINY  = 1
+    MINOR = 6
+    TINY  = 0
 
     STRING = [MAJOR, MINOR, TINY].compact.join('.')
   end