Gulp Istanbul Coverage Plugin

gulp-istanbul is a Gulp plugin that integrates Istanbul, a JavaScript code coverage tool, into a Gulp build workflow. It enables developers to instrument their source code, execute unit tests, and generate detailed coverage reports, with the option to enforce coverage thresholds. The package is currently at version 1.1.3, with its last release in mid-2017. Due to its age and the evolution of both Gulp (which has moved to Gulp 4 and beyond) and code coverage tools (with `nyc` becoming the successor to standalone Istanbul), this package is primarily in maintenance mode and is not actively developed. Its core functionality offers straightforward integration for existing Gulp 3/4 projects and includes support for sourcemaps during code instrumentation.