Downgrade tqdm version to 4.19 for py2.7 (#542)

* reduce tqdm version to 4.19 for py2.7 to avoid spurious error

* Update setup.py

* Missed =

* Update wrong version string

setup.py

@@ -40,13 +40,15 @@ requirements = [
     'numpy',
     'six',
     'torch',
-    'tqdm'
 ]
 
 pillow_ver = ' >= 4.1.1'
 pillow_req = 'pillow-simd' if get_dist('pillow-simd') is not None else 'pillow'
 requirements.append(pillow_req + pillow_ver)
 
+tqdm_ver = ' == 4.19.9' if sys.version_info[0] < 3 else ''
+requirements.append('tqdm' + tqdm_ver)
+
 setup(
     # Metadata
     name='torchvision',