Add some files to .gitignore

Author: Ghost-chu

.gitignore

@@ -45,3 +45,5 @@ hs_err_pid*
 .settings/
 .classpath
 .project
+/cache/*
+/unit-test.yml

src/main/java/org/maxgamer/quickshop/util/Util.java

@@ -1207,6 +1207,7 @@ public static boolean fireCancellableEvent(@NotNull Cancellable event) {
      */
     public static File getCacheFolder() {
         QuickShop qs = QuickShop.getInstance();
+        //noinspection ConstantConditions
         if (qs != null) {
             File cache = new File(QuickShop.getInstance().getDataFolder(), "cache");
             if (!cache.exists()) {