Maven dependencies not correctly pulled

Hi @fbeister
master-SNAPSHOT currently only works with gradle, maven seems to be too strict with the pom.xml.
Please try out the version improvement~dependencies-SNAPSHOT. This will solve the issue with maven.
We will merge this soon into master.

<dependency>
    <groupId>com.github.hivemq.hivemq-community-edition</groupId>
    <artifactId>hivemq-community-edition-embedded</artifactId>
    <version>improvement~dependencies-SNAPSHOT</version>
</dependency>