As we've seen in the past few weeks, new builds of Windows 10 in the Dev channel are being accompanied by equivalent builds of Windows Server and the Windows 10 SDK. This week is no exception, and so, build 20190 is now available for both of these products.
Unfortunately, Microsoft is also keeping up the tradition of not posting any changelogs for these build releases, so there's no telling what's new in this release. It's been multiple months since Microsoft has shared any changes made to Windows Server in the Insider program, and even the last public release was fairly minor. Either way, you can download the new build from the Windows Server Insider website.
In addition to the new Windows Server build, there's also a new build of the Windows 10 SDK, ADK, and WDK, which are most of the development tools related to Windows. As usual, though, the Hardware Lab Kit (HLK) isn't getting a new build and is still stuck on build 19041, matching the release of Windows 10 version 2004.
There's no changelog for these releases either, but you can download the SDK here, the ADK here, and the WDK here, if you want to try them out.