Bump maven-checkstyle-plugin from 3.1.2 to 3.2.0 (#239)

Author: dependabot[bot]

pom.xml

@@ -182,7 +182,7 @@
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-checkstyle-plugin</artifactId>
-          <version>3.1.2</version>
+          <version>3.2.0</version>
           <dependencies>
             <dependency>
               <groupId>com.puppycrawl.tools</groupId>