mapjfx 2.15.0 and 1.33.0 released adding circles and OpenLayers 6.4.2

I just released mapjfx versions 1.33.0 and 2.15.0, they will be available in maven central:

  <dependency>
    <groupId>com.sothawo</groupId>
    <artifactId>mapjfx</artifactId>
    <version>1.33.0</version>
  </dependency>
  <dependency>
    <groupId>com.sothawo</groupId>
    <artifactId>mapjfx</artifactId>
    <version>2.15.0</version>
  </dependency>

1.33.0 is built using Java 8 and 2.15.0 uses Java 11.

Circles can now be added to a map, giving the center coordinates and the radius in meters with custom coloring and transparency, thanks to Hanwoo Kim for this contribution!

The OpenLayers version now is 6.4.2.