Merge branch 'fix-incorrect-pip-version'

vendor/pip-pop/pip-diff

@@ -12,7 +12,7 @@ Options:
 """
 import os
 from docopt import docopt
-from pip._vendor.requests import session
+from requests import session
 try:  # for pip >= 10
     from pip._internal.index import PackageFinder
     from pip._internal.req import parse_requirements