Added sourcemap's file `stat` property to improve compatibility with other modules.
Added sourcemap's file `stat` property to improve compatibility with other modules.

floridoo/gulp-sourcemaps,gulp-sourcemaps/gulp-sourcemaps,realtymaps/gulp-sourcemaps,floridoo/gulp-sourcemaps,realtymaps/gulp-sourcemaps,gulp-sourcemaps/gulp-sourcemaps,floridoo/gulp-sourcemaps,realtymaps/gulp-sourcemaps,gulp-sourcemaps/gulp-sourcemaps