Maven dependencies for Gson not being downloaded

Question

I'm not that familiar with using Maven, so it is likely a user error in this case. My understanding of the elements in the POM file is that any "dependency" that is listed here will be retrieved from the Central Repository based upon the scope of the dependency. In my case, I'm attempting to use the Gson library from Google. It is located on the Central Repository and so it should be reachable by the Maven tool. I've executed "mvn -X compile" to determine if I can see the dependencies in the import. But I don't see them being downloaded during the compile. Any ideas as to what could be wrong with my configuration?

Below is my POM for my project.

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.acumen.app</groupId>
  <artifactId>CatalogConverter</artifactId>
  <packaging>jar</packaging>
  <version>1.0-SNAPSHOT</version>
  <name>CatalogConverter</name>
  <url>http://maven.apache.org</url>
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>com.google.code.gson</groupId>
        <artifactId>gson</artifactId>
        <version>2.3.1</version>
    </dependency>
  </dependencies>
  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>
</project>