Bump maven-assembly-plugin from 2.3 to 3.4.2 (#329)

Bumps [maven-assembly-plugin](https://github.com/apache/maven-assembly-plugin) from 2.3 to 3.4.2.
- [Release notes](https://github.com/apache/maven-assembly-plugin/releases)
- [Commits](apache/maven-assembly-plugin@maven-assembly-plugin-2.3...maven-assembly-plugin-3.4.2)

---
updated-dependencies:
- dependency-name: org.apache.maven.plugins:maven-assembly-plugin
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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Author: dependabot[bot]

pom.xml

@@ -128,7 +128,7 @@
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-assembly-plugin</artifactId>
-          <version>2.3</version>
+          <version>3.4.2</version>
         </plugin>
         <plugin>
           <artifactId>maven-release-plugin</artifactId>