After installing the update KB4495666 on your computer running the build 18356.30, the version number will bump to build 18356.53, and according to the company, this is just a monthly security update part of the April 2019 Patch Tuesday.
Download Windows 10 build 18362.53
Although there are no ISO files for Windows 10 build 18362.53, the update is available immediately through the Slow, Fast, and Release Preview ring. This preview build will download and install automatically on your device, but you can always force the update from Settings > Update & security > Windows Update, and clicking the Check for updates button. You can also check out these resources:
Windows 10 version 1903, May 2019 Update: All the new features Windows 10 version release history tracker
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