Xcode 11.4 Beta 1 was released on 5 Feb 2020 and requires macOS 10.15.2+.
It can be downloaded from https://download.developer.apple.com/Developer_Tools/Xcode_11.4_beta/Xcode_11.4_beta.xip.
Release notes are located at https://developer.apple.com/documentation/xcode_release_notes/xcode_11_4_beta_release_notes.
The SDKs it contains are:
- iOS 13.4 (Build 17E5223h)
- macOS 10.15.4 (Build 19E224g)
- tvOS 13.4 (Build 17L5225g)
- watchOS 6.2 (Build 17T5224g)
The compilers it contains are:
- clang 11.0.3 (Build 1103.0.30.11)
- swift 5.2 (Build 1103.0.22)