Bump com.github.spotbugs:spotbugs-maven-plugin from 4.8.6.6 to 4.9.1.0

Author: kostis

pom.xml

@@ -267,7 +267,7 @@
             <plugin>
                 <groupId>com.github.spotbugs</groupId>
                 <artifactId>spotbugs-maven-plugin</artifactId>
-                <version>4.8.6.6</version>
+                <version>4.9.1.0</version>
                 <configuration>
                     <includeFilterFile>.spotbugs/include.xml</includeFilterFile>
                 </configuration>