Bump spotless-maven-plugin from 2.22.0 to 2.22.1 (#159)

pom.xml

@@ -141,7 +141,7 @@
       <plugin>
         <groupId>com.diffplug.spotless</groupId>
         <artifactId>spotless-maven-plugin</artifactId>
-        <version>2.22.0</version>
+        <version>2.22.1</version>
         <configuration>
           <java>
             <importOrder/>