Fix warnings during pod trunk push

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I pushed 3.2.1 and had to use --allow-warnings.

    - NOTE  | xcodebuild:  Headers/Private/SDWebImage/UIImageView+WebCache.h:198:1: note: 'setImageWithURL:' has been explicitly marked deprecated here
    - WARN  | xcodebuild:  ARTiledImageView/Classes/ARTiledImageView.m:162:54: warning: 'downloadWithURL:options:progress:completed:' is deprecated: Method deprecated. Use `downloadImageWithURL:options:progress:completed:` [-Wdeprecated-declarations]
    - NOTE  | xcodebuild:  Headers/Private/SDWebImage/SDWebImageManager.h:294:1: note: 'downloadWithURL:options:progress:completed:' has been explicitly marked deprecated here
    - WARN  | xcodebuild:  NAMapKit/NAMapKit/NAMapView.m:131:10: warning: unused variable 'hasContentSize' [-Wunused-variable]
    - WARN  | xcodebuild:  NAMapKit/NAMapKit/NAPinAnnotation.m:15:60: warning: auto property synthesis will not synthesize property 'view'; it will be implemented by its superclass, use @dynamic to acknowledge intention [-Wobjc-property-synthesis]
    - NOTE  | xcodebuild:  NAMapKit/NAMapKit/NAAnnotation.h:22:41: note: property declared here
    - NOTE  | xcodebuild:  NAMapKit/NAMapKit/NAPinAnnotation.m:18:17: note: detected while default synthesizing properties in class implementation
    - WARN  | xcodebuild:  NAMapKit/NAMapKit/NATiledImageMapView.m:100:26: warning: 'setImageWithURL:' is deprecated: Method deprecated. Use `sd_setImageWithURL:` [-Wdeprecated-declarations]