Xcode 11.2.1 GM vs Xcode 11.2 GM

对比关键兼容字段，判断是否值得升级。

Field	Xcode 11.2.1 GM	Xcode 11.2 GM	Diff
Release type	GM	GM	same
Edition	-	-	same
Release date	2019-11-12	2019-10-31	different
Minimum macOS	10.14.4	10.14.4	same
Swift	5.1.2	5.1.2	same
iOS SDK	13.2.2	13.2	different
Build	11B500	11B52	different

建议：如果你是生产环境主力开发，优先选择 stable 版本；如需验证新 SDK，再考虑 beta。