Update to global-parent 28.

Author: stefanseifert

parent_toplevel/changes.xml

@@ -27,6 +27,9 @@
       <action type="update" dev="sseifert">
         Update to reflow-maven-skin 1.0.10.
       </action>
+      <action type="update" dev="sseifert">
+        Update to global-parent 28.
+      </action>
     </release>
 
     <release version="1.1.6" date="2019-06-26">

parent_toplevel/pom.xml

@@ -25,7 +25,7 @@
   <parent>
     <groupId>io.wcm.maven</groupId>
     <artifactId>io.wcm.maven.global-parent</artifactId>
-    <version>26</version>
+    <version>28</version>
     <relativePath />
   </parent>