- 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

gradle.properties

@@ -6,7 +6,7 @@ yarn_mappings=1.21.6+build.1
 enabled_platforms=fabric,neoforge
 
 archives_base_name=midnightlib
-mod_version=1.7.5
+mod_version=1.7.6-rc.1
 maven_group=eu.midnightdust
 release_type=release
 curseforge_id=488090