I released mapjfx version 1.19.0 it can be found at maven central, the artifact coordinates are:

  <dependency>
    <groupId>com.sothawo</groupId>
    <artifactId>mapjfx</artifactId>
    <version>1.19.0</version>
  </dependency>

The source is available at GitHub.

This version adds support for XYZ map sources. The code was contributed by Erik Jaehne, thanks a lot for that.