Bump maven-checkstyle-plugin from 3.1.1 to 3.1.2 (#724)

Author: dependabot[bot]

pom.xml

@@ -211,7 +211,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-checkstyle-plugin</artifactId>
-        <version>3.1.1</version>
+        <version>3.1.2</version>
         <dependencies>
           <dependency>
             <groupId>com.puppycrawl.tools</groupId>