move event bus loading to preInit

src/main/java/com/falsepattern/lib/config/ConfigurationManager.java

@@ -226,10 +226,16 @@ public class ConfigurationManager {
             return;
         }
         configDir = FileUtil.getMinecraftHome().toPath().resolve("config");
-        FMLCommonHandler.instance().bus().register(instance);
         initialized = true;
     }
 
+    /**
+     * Internal, do not use.
+     */
+    public static void registerBus() {
+        FMLCommonHandler.instance().bus().register(instance);
+    }
+
     /**
      * Internal, do not use.
      *

src/main/java/com/falsepattern/lib/internal/proxy/CommonProxy.java

@@ -23,6 +23,7 @@ public class CommonProxy {
     protected Future<List<ModUpdateInfo>> updatesFuture;
 
     public void preInit(FMLPreInitializationEvent e) {
+        ConfigurationManager.registerBus();
         try {
             ConfigurationManager.registerConfig(LibraryConfig.class);
         } catch (ConfigException ex) {