Fix dependency

Author: dreampiggy

Cartfile

@@ -1,2 +1,2 @@
-github "SDWebImage/SDWebImage" ~> 5.13
+github "SDWebImage/SDWebImage" ~> 5.15
 github "SDWebImage/libwebp-Xcode" ~> 1.0

Package.swift

@@ -17,7 +17,7 @@ let package = Package(
     dependencies: [
         // Dependencies declare other packages that this package depends on.
         // .package(url: /* package url */, from: "1.0.0"),
-        .package(url: "https://github.com/SDWebImage/SDWebImage.git", from: "5.13.0"),
+        .package(url: "https://github.com/SDWebImage/SDWebImage.git", from: "5.15.0"),
         .package(url: "https://github.com/SDWebImage/libwebp-Xcode.git", from: "1.1.0")
     ],
     targets: [