<repository>
<id>gravemc-repo</id>
<url>https://repo.gravemc.net/releases/</url>
</repository>
<dependency>
<groupId>dev.iiahmed</groupId>
<artifactId>ModernDisguise</artifactId>
<version>3.0</version>
<scope>compile</scope>
</dependency>
Make sure you have the maven shade plugin in order for it to be included in your jar file.
You can relocate the package as well, here's an example maven-shade-plugin config:
<configuration>
<filters>
<filter>
<artifact>*:*</artifact>
<excludes>
<exclude>META-INF/</exclude>
</excludes>
</filter>
</filters>
<relocations>
<relocation>
<pattern>dev.iiahmed.disguise</pattern>
<shadedPattern>your.own.package.disguise</shadedPattern>
</relocation>
</relocations>
</configuration>