Fix the wrong declaration of SDCallbackQueue's block, should be escaping to match GCD block

This may cause the wrong lifecycle for block (earily release)

Author: dreampiggy

SDWebImage/Core/SDCallbackQueue.h

@@ -45,10 +45,10 @@ typedef NS_ENUM(NSUInteger, SDCallbackPolicy) {
 
 /// Submits a block for execution and returns after that block finishes executing.
 /// - Parameter block: The block that contains the work to perform.
-- (void)sync:(nonnull NS_NOESCAPE dispatch_block_t)block;
+- (void)sync:(nonnull dispatch_block_t)block;
 
 /// Schedules a block asynchronously for execution.
 /// - Parameter block: The block that contains the work to perform.
-- (void)async:(nonnull NS_NOESCAPE dispatch_block_t)block;
+- (void)async:(nonnull dispatch_block_t)block;
 
 @end

SDWebImage/Core/SDCallbackQueue.m

@@ -79,7 +79,7 @@ + (SDCallbackQueue *)globalQueue {
     return queue;
 }
 
-- (void)sync:(nonnull NS_NOESCAPE dispatch_block_t)block {
+- (void)sync:(nonnull dispatch_block_t)block {
     switch (self.policy) {
         case SDCallbackPolicySafeExecute:
             SDSafeExecute(self.queue, block, NO);
@@ -93,7 +93,7 @@ - (void)sync:(nonnull NS_NOESCAPE dispatch_block_t)block {
     }
 }
 
-- (void)async:(nonnull NS_NOESCAPE dispatch_block_t)block {
+- (void)async:(nonnull dispatch_block_t)block {
     switch (self.policy) {
         case SDCallbackPolicySafeExecute:
             SDSafeExecute(self.queue, block, YES);