Changelog:
============
-Removed support for the deprecated urllib3[secure] extra.
-Removed support for the deprecated SecureTransport TLS implementation.
-Removed support for the end-of-life Python 3.7.
-Allowed loading CA certificates from memory for proxies.
-Fixed decoding Gzip-encoded responses which specified x-gzip content-encoding.
Signed-off-by: Wang Mingyu <wangmy@fujitsu.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>