v1.4.0-alpha.1

What's Changed

Features 🎉

• Opt physics experience and opt physics unit test by @luzhuang in #2420
• Support background audio by @GuoLei1990 in #2449
• Entity support add other Transform by @cptbtptpbcptdtptp in #2456
• PBR support sheen by @hhhhkrx in #2448

Fixed 🐞

• Fix particle emit bug and afterimage bug by @GuoLei1990 in #2434
• Fix reource load issue in local downloaded npm package by @Sway007 in #2436
• Fix renderQueueType error by @zhuxudong in #2437
• Fix Transform world scale dirty error by @cptbtptpbcptdtptp in #2408
• Fix clear flag of internal render target by @zhuxudong in #2444

Other Changes

• Polyfill String.matchAll for compatibility by @Sway007 in #2443

Full Changelog: v1.4.0-alpha.0...v1.4.0-alpha.1