0.3.0

What's Changed

• Update README.md by @wu-sheng in #24
• Improve errors. by @jmjoy in #25
• Add tracer. by @jmjoy in #26
• Move e2e to workspace. by @jmjoy in #27
• Auto finalize context and span when dropped. by @jmjoy in #28
• Add context capture and continued methods. by @jmjoy in #29
• Bump to 0.3.0. by @jmjoy in #30

Full Changelog: v0.2.0...v0.3.0