README.md in oj-2.17.2 vs README.md in oj-2.17.3

@@ -168,9 +168,14 @@
   default for each mode which are :raise for :strict, :null for :null, and :word
   for :compat. Default is :auto.
 
 ## Releases
 
+**Release 2.17.3**
+
+- Updated mimic_JSON to monkey patch OpenStruct, Range, Rational, Regexp, Struct, Symbol,
+  and Time like the JSON gem does. Also added the JSON.create_id accessor.
+
 **Release 2.17.2**
 
  - Worked around a problem with DateTime and ActiveSupport that causes a hang
    when hour, minute, second, and some other methods are called from C.