CHANGELOG.md in pesapal-1.5.4 vs CHANGELOG.md in pesapal-1.5.5

@@ -1,7 +1,21 @@
 Changelog
 =========
 
+v1.5.5
+------
+
+* Improve code formatting
+* Add comprehensive inline documentation (Yard)
+* Move documentation from gem to it's own homepage, separate content from it's
+  own code e.g. we shouldn't have to update the gem each time we update the
+  README. This is also good because the only documentation that should go to
+  RubyDoc.info is inline (generated by Yard) which sticks with the version that it
+  was written for making it easy for someone to refer to documentation for old
+  versions.
+* Write tests, coverage now at 98%
+* Fix query_payment_details call "can't split nil String" error due to calling wrong endpoint
+
 v1.5.4
 ------
 
 * Renamed repo from `pesapal-rubygem` to `pesapal-gem` (breaks badge links in old READMEs)
 * Write tests