Update Maven POM to match Gradle build
Update Maven POM to match Gradle build

Postremus/GlowstonePlusPlus,BlazePowered/Blaze-Server,GlowstoneMC/GlowstonePlusPlus,keke142/GlowstonePlusPlus,BlazePowered/Blaze-Server,GlowstonePlusPlus/GlowstonePlusPlus,jimmikaelkael/GlowstonePlusPlus,GreenBeard/GlowstonePlusPlus,GlowstoneMC/GlowstonePlusPlus,GlowstonePlusPlus/GlowstonePlusPlus,BlazePowered/Blaze-Server,BlazePowered/Blaze-Server,GlowstonePlusPlus/GlowstonePlusPlus,GreenBeard/GlowstonePlusPlus,GlowstoneMC/GlowstonePlusPlus,keke142/GlowstonePlusPlus,Postremus/GlowstonePlusPlus,LukBukkit/GlowstonePlusPlus,GlowstonePlusPlus/GlowstonePlusPlus,GreenBeard/GlowstonePlusPlus,Postremus/GlowstonePlusPlus,keke142/GlowstonePlusPlus,jimmikaelkael/GlowstonePlusPlus,GlowstoneMC/GlowstonePlusPlus,GreenBeard/GlowstonePlusPlus,keke142/GlowstonePlusPlus,LukBukkit/GlowstonePlusPlus,LukBukkit/GlowstonePlusPlus,Postremus/GlowstonePlusPlus,jimmikaelkael/GlowstonePlusPlus,jimmikaelkael/GlowstonePlusPlus,LukBukkit/GlowstonePlusPlus