v0.12.0

A mostly procedural update to Go kit, including support for the latest version of Go, and updates for dependencies, including a long-awaited update to avoid a CVE in the JWT dependency.

• Update for Go 1.17 (#1183) — thanks, @sagikazarmark, @ChrisHines
• Update depedency speed (#1177) — thanks, @sagikazarmark
• Improve code quality (#1168, #1064) — thanks, @withshubh, @sagikazarmark
• Update hudl/fargo (#1167) — thanks, @sagikazarmark
• Update JWT dependency (#1172) — thanks, @vovinacci
• Replace kit/log with log ((#1173) — thanks, @ChrisHines
• Update repo issue forms (#1169, #1166) — thanks, @sagikazarmark