message: Changed swift liibrary pixel buffer utility call to use GMLImageUtils category
diff: @@ -246,8 +246,7 @@ class TFLImageSegmenterTests: XCTestCase {
  filename: "segmentation_golden_rotation0",
  type: "png"))
  - let pixelBuffer = GMLImageUtils.grayScalePixelBuffer(with: goldenMaskImage)
  - .takeRetainedValue()
  + let pixelBuffer = goldenMaskImage.grayScalePixelBuffer().takeRetainedValue()
  CVPixelBufferLockBaseAddress(pixelBuffer, CVPixelBufferLockFlags.readOnly)
  