Remove use of gulp-vinyl-zip
The gulp-vinyl-zip package is merely a streams wrapper and, furthermore, is no longer maintained. This is a good opportunity to remove a dependency in Antora. The package should be replaced with direct calls to the underlying zip libraries (yazl/yazul) to create and extract zip files.
The gulp-vinyl-zip package is used in the following Antora components:
- ui-loader - to unzip the bundle
- file-publisher - to create a zip of the published output
The dependency on this package will also need to removed from the build for the default UI project.