v0.12.1

What's Changed

• Remove metrics and prometheus exporter by @kylehuntsman in #286
• Update HTTP_SPEC.md by @kylehuntsman in #283
• fix: remove debug print by @rvagg in #291
• test: ensure available port for test server by @rvagg in #295
• test: extra debug output for flaky failure case by @rvagg in #292
• fix: add back pprof endpoints by @kylehuntsman in #300
• Fix unterminated chunk code by @hannahhoward in #301

Full Changelog: v0.12.0...v0.12.1