Httplib2

Python3: PROXY_TYPE_SOCKS5 with str user/pass raised TypeError
https://github.com/httplib2/httplib2/pull/145

Python3: Use no_proxy
https://github.com/httplib2/httplib2/pull/140

Allow setting TLS max/min versions
https://github.com/httplib2/httplib2/pull/138

No changes to library. Distribute py3 wheels.

Catch socket timeouts and clear dead connection
https://github.com/httplib2/httplib2/issues/18
https://github.com/httplib2/httplib2/pull/111

Officially support Python 3.7 (package metadata)
https://github.com/httplib2/httplib2/issues/123

Drop support for Python 3.3

ca_certs from environment HTTPLIB2_CA_CERTS or certifi
https://github.com/httplib2/httplib2/pull/117

PROXY_TYPE_HTTP with non-empty user/pass raised TypeError: bytes required
https://github.com/httplib2/httplib2/pull/115

Revert http:443->https workaround
https://github.com/httplib2/httplib2/issues/112

eliminate connection pool read race
https://github.com/httplib2/httplib2/pull/110

cache: stronger safename
https://github.com/httplib2/httplib2/pull/101