#711: Update Maven plugin version to 0.9.1.

Author: yegor256

.rultor.yml

@@ -14,9 +14,6 @@ install: |
   pdd --file=/dev/null
 merge:
   script: |
-    pwd
-    ls -al .
-    ls -al ..
     mvn clean install -Pqulice --errors -Dstyle.color=never
 release:
   pre: false

pom.xml

@@ -398,7 +398,7 @@
           <plugin>
             <groupId>org.eolang</groupId>
             <artifactId>hone-maven-plugin</artifactId>
-            <version>0.7.8</version>
+            <version>0.9.1</version>
             <executions>
               <execution>
                 <goals>