Bump org.apache.maven.plugins:maven-dependency-plugin from 2.1 to 3.8.1 (#44)

diff --git a/liblinear-addon/pom.xml b/liblinear-addon/pom.xml
index 48023ca..11c145c 100644
--- a/liblinear-addon/pom.xml
+++ b/liblinear-addon/pom.xml
@@ -64,7 +64,7 @@
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-dependency-plugin</artifactId>
-				<version>2.1</version>
+				<version>3.8.1</version>
 				<executions>
 					<execution>
 						<id>copy-dependencies</id>