MQTT5 fixes and general improvements

What's Changed

• New CD workflow by @TwistedTwigleg in #336
• Java keystore support by @TwistedTwigleg in #337
• Mqtt custom auth websockets support by @TwistedTwigleg in #342
• Adjust ReadMe, fix Android install instructions by @TwistedTwigleg in #343
• fix typo by @jmklix in #344
• Update submodules to latest release by @TwistedTwigleg in #348
• Fix minor mistake in release YAML by @TwistedTwigleg in #349
• Minor release pipeline fix by @xiazhvera in #350
• AutoTag PR for v1.11.1 by @TwistedTwigleg in #351

Full Changelog: v1.11.0...v1.11.1