Rename files with Gulp

gulpfile.js

var gulp = require("gulp");
var rename = require("gulp-rename");

gulp.task('default', function() {
  return gulp.src("./*.md")
    .pipe(rename(function(path) {
      path.basename = path.basename.replace(/(\D*\d{4}-\D*\d{2}-\D*\d{2})(-)/, "$1.");
    }))
    .pipe(gulp.dest("./renamed"));
});

package.json

{
  "name": "gulp-rename",
  "version": "1.0.0",
  "main": "gulpfile.js",
  "author": "Tyler van der Hoeven",
  "devDependencies": {
    "gulp": "^3.9.0",
    "gulp-rename": "^1.2.2"
  }
}