CHANGELOG.md in tee_logger-3.0.0 vs CHANGELOG.md in tee_logger-3.0.1

@@ -1,4 +1,7 @@
+# v3.0.1
+- refactoring for [issue #9](https://github.com/k-ta-yamada/tee_logger/issues/9)
+
 # v3.0.0
 - [issue #4](https://github.com/k-ta-yamada/tee_logger/issues/4)
   logging method's parametrer disabling_target change to enabling_targe
 - [issue #5](https://github.com/k-ta-yamada/tee_logger/issues/5)
   log message indentation