v6.6.3

What's Changed

• chore(deps): migrate @babel/plugin-proposal-* to @babel/plugin-transform-* by @wjhsf in #4195
• chore(scripts): remove --all from build script to enable using --project by @wjhsf in #4192
• perf(engine-server): faster <style> validation by @nolanlawson in #4201
• chore: release v6.6.3 by @nolanlawson in #4202
• chore: release v6.6.3 by @nolanlawson in #4204

Full Changelog: v6.6.2...v6.6.3