Change access modifier of Delay#getExpireAt to public

Author: Jakubk15

eternalcode-commons-shared/src/main/java/com/eternalcode/commons/delay/Delay.java

@@ -63,7 +63,7 @@ public Duration getRemaining(T key) {
     }
 
     @Nullable
-    private Instant getExpireAt(T key) {
+    public Instant getExpireAt(T key) {
         return this.cache.getIfPresent(key);
     }