Recenlty i decided to update the spfx libs of my webparts project to the v1.12.1 I have followed the steps indicated in the official Microsoft documentation: https://docs.microsoft.com/es-es/sharepoint/dev/spfx/release-1.12.1
Now I realized that gulp serve has been replaced with: 'gulp serve-deprecated'. So Ive gone to the official documentation and I have read this:
Local workbench is deprecated - This is the last release that will include support for the local workbench. - https://docs.microsoft.com/en-us/sharepoint/dev/spfx/release-1.12.1#deprecations-and-removed-items-in-this-release
So my question now is: how is supposed to work with web parts development now or in the future?
If i cant test my web parts with gulp serve how is supposed I can to test them?