v6.4.3

What's Changed

• chore: drop pprof dev-dependency to remove vulnerable quick-xml by @sunng87 in #769
• chore(deps-dev): bump ws from 8.18.0 to 8.21.0 in /playground/www by @dependabot[bot] in #770
• feat: add preserve_json_order feature flag by @sunng87 in #767
• fix: handle leading tilde on else if chain tags by @sunng87 in #768

Full Changelog: v6.4.2...v6.4.3