BlueMap/BlueMapBukkit/build.gradle

repositories {
		maven {
		url = 'https://hub.spigotmc.org/nexus/content/repositories/snapshots/'

		// As of Gradle 5.1, you can limit this to only those
		// dependencies you expect from it
		content {
			includeGroup 'org.bukkit'
		}
	}
}

dependencies {
    shadow "org.bukkit:bukkit:1.14.4-R0.1-SNAPSHOT"
    //compile group: 'org.bstats', name: 'bstats-sponge-lite', version: '1.5'
    compile project(':BlueMapPlugin')
}