Merge pull request #714 from square/egorand/190313/checkstyle-8.18

Checkstyle 8.18
diff --git a/pom.xml b/pom.xml
index 15c1b77..34c03e7 100644
--- a/pom.xml
+++ b/pom.xml
@@ -123,7 +123,7 @@
           <dependency>
             <groupId>com.puppycrawl.tools</groupId>
             <artifactId>checkstyle</artifactId>
-            <version>8.7</version>
+            <version>8.18</version>
           </dependency>
         </dependencies>
         <configuration>