Refactor to PaperPlugin

src/main/java/com/alttd/altitudetag/AltitudeTagBootstrap.java

@@ -0,0 +1,13 @@
+package com.alttd.altitudetag;
+
+
+import io.papermc.paper.plugin.bootstrap.BootstrapContext;
+import io.papermc.paper.plugin.bootstrap.PluginBootstrap;
+
+@SuppressWarnings("UnstableApiUsage")
+public class AltitudeTagBootstrap implements PluginBootstrap {
+
+    @Override
+    public void bootstrap(BootstrapContext context) {}
+
+}