revert to older requests version

lib/requests/packages/urllib3/util/__init__.py

@@ -0,0 +1,24 @@
+# For backwards compatibility, provide imports that used to be here.
+from .connection import is_connection_dropped
+from .request import make_headers
+from .response import is_fp_closed
+from .ssl_ import (
+    SSLContext,
+    HAS_SNI,
+    assert_fingerprint,
+    resolve_cert_reqs,
+    resolve_ssl_version,
+    ssl_wrap_socket,
+)
+from .timeout import (
+    current_time,
+    Timeout,
+)
+
+from .retry import Retry
+from .url import (
+    get_host,
+    parse_url,
+    split_first,
+    Url,
+)