v1.3.9

What's Changed

• bump http_proxy by @mamantoha in #205
• ensure pkg-config is installed on macOS by @mamantoha in #208
• Revert "ensure pkg-config is installed on macOS" by @mamantoha in #209
• fix getting filename from response header by @mamantoha in #210

Full Changelog: v1.3.8...v1.3.9