Support to use the creation date and the change date to determine the disk cache expire date compare

SDWebImage/Core/SDDiskCache.m

@@ -146,11 +146,15 @@ static NSString * const SDDiskCacheExtendedAttributeName = @"com.hackemist.SDDis
         case SDImageCacheConfigExpireTypeAccessDate:
             cacheContentDateKey = NSURLContentAccessDateKey;
             break;
-            
         case SDImageCacheConfigExpireTypeModificationDate:
             cacheContentDateKey = NSURLContentModificationDateKey;
             break;
-            
+        case SDImageCacheConfigExpireTypeCreationDate:
+            cacheContentDateKey = NSURLCreationDateKey;
+            break;
+        case SDImageCacheConfigExpireTypeChangeDate:
+            cacheContentDateKey = NSURLAttributeModificationDateKey;
+            break;
         default:
             break;
     }

SDWebImage/Core/SDImageCacheConfig.h

@@ -12,13 +12,21 @@
 /// Image Cache Expire Type
 typedef NS_ENUM(NSUInteger, SDImageCacheConfigExpireType) {
     /**
-     * When the image is accessed it will update this value
+     * When the image cache is accessed it will update this value
      */
     SDImageCacheConfigExpireTypeAccessDate,
     /**
-     * The image was obtained from the disk cache (Default)
+     * When the image cache is created or modified it will update this value (Default)
      */
-    SDImageCacheConfigExpireTypeModificationDate
+    SDImageCacheConfigExpireTypeModificationDate,
+    /**
+     * When the image cache is created it will update this value
+     */
+    SDImageCacheConfigExpireTypeCreationDate,
+    /**
+     * When the image cache is created, modified, renamed, file attribute updated (like permission, xattr)  it will update this value
+     */
+    SDImageCacheConfigExpireTypeChangeDate,
 };
 
 /**