Merge pull request #17628 from bf4/update_unicode

Update to Unicode 7.0.0

activesupport/lib/active_support/multibyte/unicode.rb

@@ -11,7 +11,7 @@ module Unicode
       NORMALIZATION_FORMS = [:c, :kc, :d, :kd]
 
       # The Unicode version that is supported by the implementation
-      UNICODE_VERSION = '6.3.0'
+      UNICODE_VERSION = '7.0.0'
 
       # The default normalization used for operations that require
       # normalization. It can be set to any of the normalizations