Updates version of httplib2.

Retries on 502.

Updates version to 3.3.0.

Bundles certifi and uses this for the certificates.

SG-17710: update task dependencies section (shotgunsoftware#232)

* SG-17710: update task dependencies section

* SG-17710: fixes based on review comments

Co-authored-by: Vladimir Gusarov <vladimir.gusarov@autodesk.com>

SG-17710: update task dependencies section (shotgunsoftware#232)

* SG-17710: update task dependencies section

* SG-17710: fixes based on review comments

Co-authored-by: Vladimir Gusarov <vladimir.gusarov@autodesk.com>

Updated httplib2 to 0.18.0

packaging for the v3.2.3 release

Packaging for v3.2.2 release (shotgunsoftware#221)

Tagging v3.2.1