Update poms for spotless

Author: brendandburns

examples/examples-release-17/pom.xml

@@ -95,6 +95,11 @@
 
 	<build>
 		<plugins>
+			<plugin>
+        		<groupId>com.diffplug.spotless</groupId>
+        		<artifactId>spotless-maven-plugin</artifactId>
+        		<version>2.43.0</version>
+        	</plugin>
 			<plugin>
 				<groupId>org.sonatype.plugins</groupId>
 				<artifactId>nexus-staging-maven-plugin</artifactId>

examples/examples-release-18/pom.xml

@@ -96,6 +96,11 @@
 
 	<build>
 		<plugins>
+			<plugin>
+        		<groupId>com.diffplug.spotless</groupId>
+        		<artifactId>spotless-maven-plugin</artifactId>
+        		<version>2.43.0</version>
+        	</plugin>
 			<plugin>
 				<groupId>org.sonatype.plugins</groupId>
 				<artifactId>nexus-staging-maven-plugin</artifactId>

examples/examples-release-19/pom.xml

@@ -100,6 +100,11 @@
 
 	<build>
 		<plugins>
+			<plugin>
+        		<groupId>com.diffplug.spotless</groupId>
+        		<artifactId>spotless-maven-plugin</artifactId>
+        		<version>2.43.0</version>
+        	</plugin>
 			<plugin>
 				<groupId>org.sonatype.plugins</groupId>
 				<artifactId>nexus-staging-maven-plugin</artifactId>

examples/examples-release-20/pom.xml

@@ -100,6 +100,11 @@
 
 	<build>
 		<plugins>
+			<plugin>
+        		<groupId>com.diffplug.spotless</groupId>
+        		<artifactId>spotless-maven-plugin</artifactId>
+        		<version>2.43.0</version>
+        	</plugin>
 			<plugin>
 				<groupId>org.sonatype.plugins</groupId>
 				<artifactId>nexus-staging-maven-plugin</artifactId>