Changes in write_xlsx-0.81.0 vs Changes in write_xlsx-0.81.1

@@ -1,5 +1,8 @@
 Change history of write_xlsx rubygem.
[phone] v0.81.1
+   use test-unit gem instead of test/unit.
+
 2014-12-04 v0.81.0
    Add chart axis line and fill properties.
 
 2014-11-30 v0.80.0
    Chart Data Label enhancements. Added number formatting, font handling