v1.3.1

Fixes

• Escape colon in path segment (#1237, @yarafan)
• Handle IPv6 address String on Faraday::Connection#proxy_from_env (#1252, @cosmo0920)

Documentation

• Fix broken Rubydoc.info links (#1236, @nickcampbell18)
• Add httpx to list of external adapters (#1246, @HoneyryderChuck)

Misc

• Refactor CI to remove duplicated line (#1230, @tricknotes)
• Gemspec: Pick a good ruby2_keywords release (#1241, @olleolleolle)