Upgrade to maven-dependency-plugin 3.1.2

Closes gh-237

Author: philwebb

pom.xml

@@ -110,7 +110,7 @@
 				<plugin>
 					<groupId>org.apache.maven.plugins</groupId>
 					<artifactId>maven-dependency-plugin</artifactId>
-					<version>3.1.1</version>
+					<version>3.1.2</version>
 				</plugin>
 				<plugin>
 					<groupId>org.apache.maven.plugins</groupId>