CHANGELOG in pdf-reader-2.1.0 vs CHANGELOG in pdf-reader-2.2.0

@@ -1,5 +1,10 @@
-v2.1.0 (15th Februar 2018)
+v2.2.0 (18th December 2018)
+- Support additional XRef Stream variants (thanks Stefan Wienert)
+- Add frozen_strings pragma to reduce object allocations on ruby 2.3+
+- various bug fixes
+
+v2.1.0 (15th February 2018)
 - Support extra encrypted PDF variants (thanks to Gyuchang Jun)
 - various bug fixes
 
 v2.0.0 (25th February 2017)
 - various bug fixes