Update Hub Path inputs (#4200)

hubconf.py

     import cv2
     import numpy as np
     from PIL import Image
+    from pathlib import Path
 
     imgs = ['data/images/zidane.jpg',  # filename
-            'https://github.com/ultralytics/yolov5/releases/download/v1.0/zidane.jpg',  # URI
+            Path('data/images/zidane.jpg'),  # Path
+            'https://ultralytics.com/images/zidane.jpg',  # URI
             cv2.imread('data/images/bus.jpg')[:, :, ::-1],  # OpenCV
             Image.open('data/images/bus.jpg'),  # PIL
             np.zeros((320, 640, 3))]  # numpy

models/common.py

 
 import logging
 from copy import copy
-from pathlib import Path, PosixPath
+from pathlib import Path
 
 import math
 import numpy as np
         shape0, shape1, files = [], [], []  # image and inference shapes, filenames
         for i, im in enumerate(imgs):
             f = f'image{i}'  # filename
-            if isinstance(im, (str, PosixPath)):  # filename or uri
+            if isinstance(im, (str, Path)):  # filename or uri
                 im, f = Image.open(requests.get(im, stream=True).raw if str(im).startswith('http') else im), im
                 im = np.asarray(exif_transpose(im))
             elif isinstance(im, Image.Image):  # PIL Image