Bump mockito-core from 3.8.0 to 3.9.0 #178.
diff --git a/src/changes/changes.xml b/src/changes/changes.xml
index 18c870a..3886b63 100644
--- a/src/changes/changes.xml
+++ b/src/changes/changes.xml
@@ -93,6 +93,9 @@
       <action dev="ggregory" due-to="Boris Petrov" type="update">
         Update `actions/setup-java` to v2 #177.
       </action>
+      <action dev="ggregory" due-to="Dependabot" type="update">
+        Bump mockito-core from 3.8.0 to 3.9.0 #178.
+      </action>
     </release>
     <release version="2.8.0" date="2021-03-06" description="Feature and maintenance release. Requires Java 8.">
 <!--       <action issue="VFS-443" dev="ggregory" type="update" due-to="nickallen"> -->