- fix: NullPointerException when the config class of mod updated

- alter: better test code in `common/src/test`, `neoforge/src/test` and `fabric/src/test`, run `Test Minecraft Client(:fabric)` or `Test Minecraft Client(:neoforge)` for testing

settings.gradle

@@ -9,9 +9,9 @@ pluginManagement {
 
 include("common")
 include("fabric")
-include("test-fabric")
+//include("test-fabric")
 include("neoforge")
-include("test-neoforge")
+//include("test-neoforge")
 //include("quilt")
 
 rootProject.name = "midnightlib"