Update the test case because upstream changes

Author: dreampiggy

Tests/SDWebImageWebPCoderTests.m

@@ -193,9 +193,9 @@ - (void)test34StaticImageNotCreateCGContext {
     NSURL *staticWebPURL = [[NSBundle bundleForClass:[self class]] URLForResource:@"TestImageStatic" withExtension:@"webp"];
     NSData *data = [NSData dataWithContentsOfURL:staticWebPURL];
     SDImageWebPCoder *coder = [[SDImageWebPCoder alloc] initWithAnimatedImageData:data options:nil];
-    XCTAssertTrue(coder.animatedImageFrameCount == 1);
+    XCTAssertTrue(coder.animatedImageFrameCount == 0);
     UIImage *image = [coder animatedImageFrameAtIndex:0];
-    XCTAssertNotNil(image);
+    XCTAssertNil(image);
     Ivar ivar = class_getInstanceVariable(coder.class, "_canvas");
     CGContextRef canvas = ((CGContextRef (*)(id, Ivar))object_getIvar)(coder, ivar);
     XCTAssert(canvas == NULL);