If you wish to use prorpgitems as a dependency in your projects, include the following in your pom.xml
<repository>
<id>github</id>
<url>https://maven.pkg.github.com/promcteam/promccore</url>
</repository>
...
<dependency>
<groupId>mc.promcteam</groupId>
<artifactId>prorpgitems</artifactId>
<version>1.0.3.13-ALPHA</version>
</dependency>
Additionally, you'll need to make sure that you have properly configured Authentication with GitHub Packages.