Version 5.0 compatible test

Tests/KingfisherTests/ImageExtensionTests.swift

@@ -72,7 +72,7 @@ class ImageExtensionTests: XCTestCase {
 
 #if os(iOS) || os(tvOS)
     func testScaleForGIFImage() {
-        let image = Kingfisher<Image>.animated(with: testImageGIFData, scale: 2.0, duration: 0.0, preloadAll: false, onlyFirstFrame: false)
+        let image = KingfisherClass.animated(with: testImageGIFData, scale: 2.0, duration: 0.0, preloadAll: false, onlyFirstFrame: false)
         XCTAssertNotNil(image, "The image should be initiated.")
         XCTAssertEqual(image!.scale, 2.0, "should have correct scale")
     }