Upgrade maven-assmebly-plugin to 3.3.0 to fix file permissions

The old default version of maven-assembly-plugin generates packages
containing dangerous world writable files.

Fixes #413

Author: ato

contrib/pom.xml

@@ -114,7 +114,9 @@
 			</plugin>
 
 			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-assembly-plugin</artifactId>
+				<version>3.3.0</version>
 				<configuration>
 					<descriptors>
 						<descriptor>
@@ -127,7 +129,7 @@
 						<id>job.assembly.package</id>
 						<phase>package</phase>
 						<goals>
-							<goal>attached</goal>
+							<goal>single</goal>
 						</goals>
 					</execution>
 				</executions>

dist/pom.xml

@@ -40,7 +40,9 @@
 			</plugin>
 
 			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-assembly-plugin</artifactId>
+				<version>3.3.0</version>
 				<configuration>
 					<descriptors>
 						<descriptor>
@@ -56,7 +58,7 @@
 						<id>job.assembly.package</id>
 						<phase>package</phase>
 						<goals>
-							<goal>attached</goal>
+							<goal>single</goal>
 						</goals>
 					</execution>
 				</executions>