maven versions

Author: bosborn

pom.xml

@@ -122,7 +122,7 @@
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-source-plugin</artifactId>
-				<version>3.2.1</version>
+				<version>3.3.0</version>
 				<executions>
 					<execution>
 						<id>attach-sources</id>
@@ -135,7 +135,7 @@
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-javadoc-plugin</artifactId>
-				<version>3.4.1</version>
+				<version>3.6.3</version>
 				<configuration>
 					<links>
 						<link>http://ngageoint.github.io/coordinate-reference-systems-java/docs/api/</link>
@@ -156,7 +156,7 @@
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-gpg-plugin</artifactId>
-				<version>3.0.1</version>
+				<version>3.2.1</version>
 				<executions>
 					<execution>
 						<id>sign-artifacts</id>