Mqtt5 Support (Developer Preview)
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What's Changed
- Set github.head_ref as env in CI by @sbSteveK in #493
- Fix release workflow by @TwistedTwigleg in #498
- Mqtt5 Support by @xiazhvera in #500
Full Changelog: v1.19.3...v1.20.0
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Full Changelog: v1.19.3...v1.20.0