Version 0.12.0

What's Changed

• feat: otel go metrics setup by @tim-mwangi in #200
• feat: use a modified batch span processor that creates metrics by @tim-mwangi in #201
• feat: refactor http operation metrics to handle multiple frameworks by @tim-mwangi in #202
• fix: disable metrics if using zipkin traces endpoint but empty metrics endpoint by @tim-mwangi in #203

Full Changelog: v0.11.0...v0.12.0