Bump spotless-maven-plugin from 2.23.0 to 2.24.0 (#311)

pom.xml

@@ -159,7 +159,7 @@
       <plugin>
         <groupId>com.diffplug.spotless</groupId>
         <artifactId>spotless-maven-plugin</artifactId>
-        <version>2.23.0</version>
+        <version>2.24.0</version>
         <configuration>
           <java>
             <importOrder/>