Bump httplib2 to 0.12.0

[gertvdijk]

Notable improvement is the way it looks up a CA cert bundle; this version introduces support for setting a custom CA cert bundle path using the environment variable HTTPLIB2_CA_CERTS.

See also httplib2/httplib2#2 (comment).

Assuming that your custom organization CA is added to your system CA bundle already, you could point it to your system bundle with a system-wide environment variable, e.g. on Debian:

$ echo 'export HTTPLIB2_CA_CERTS=/etc/ssl/certs/ca-certificates.crt' > /etc/profile.d/httplib2.sh

(And then re-login to activate the changes.)

The above approach might be a simpler alternative to PRs #89 and #52.

[ali5h]

any update on this?

[gertvdijk]

It look like no PRs in this repository are being considered and builds all fail. I see that PRs by members are merged though (#133), so perhaps we should just kindly ask...

Hi @KaylaNguyen, could you please review this PR? Thanks.

[ali5h]

for now I am building puller.par manually and loading it before rules_docker, which fixed the problem

[jonjohnsonjr]

Fixed by #160