Merge pull request #13 from Azure/sjkwak-patch-1

Update checkstyle artifact dependency to address CVE-2019-9658

Author: sjkwak

pom.xml

@@ -40,7 +40,7 @@
                     <dependency>
                         <groupId>com.puppycrawl.tools</groupId>
                         <artifactId>checkstyle</artifactId>
-                        <version>8.8</version>
+                        <version>8.18</version>
                     </dependency>
                 </dependencies>
             </plugin>