update checkstyle to upgrade at runtime

pom.xml

@@ -169,6 +169,18 @@
                         			<failOnMissingWebXml>false</failOnMissingWebXml>
                     			</configuration>
                 		</plugin>
+                		<plugin>
+					<groupId>org.apache.maven.plugins</groupId>
+					<artifactId>maven-checkstyle-plugin</artifactId>
+					<version>2.17</version>
+					<dependencies>
+            					<dependency>
+              						<groupId>com.puppycrawl.tools</groupId>
+              						<artifactId>checkstyle</artifactId>
+              						<version>6.16.1</version>
+            					</dependency>
+          				</dependencies>
+				</plugin>
 			</plugins>
 		</pluginManagement>
 		<plugins>
@@ -191,7 +203,6 @@
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-checkstyle-plugin</artifactId>
-				<version>2.17</version>
 				<configuration>
 					<configLocation>google_checks.xml</configLocation>
 					<failOnViolation>false</failOnViolation>
@@ -245,7 +256,6 @@
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-checkstyle-plugin</artifactId>
-				<version>2.17</version>
 				<configuration>
 					<configLocation>google_checks.xml</configLocation>
 					<failOnViolation>false</failOnViolation>