remove vulnerable dependencies

gulpfile.js

@@ -1,6 +1,7 @@
 'use strict';
 
 var gulp = require ('gulp');
+var cleanCSS = require('gulp-clean-css');
 var $ = require ('gulp-load-plugins') ();
 var connect = require('gulp-connect');
 
@@ -31,7 +32,7 @@ gulp.task('handleStyle', function() {
         .pipe($.sass ())
         .pipe($.autoprefixer())
         .pipe(gulp.dest (paths.css.dir))
-        .pipe($.cssmin())
+        .pipe(cleanCSS())
         .pipe($.rename({
             suffix: '.min'
         }))

package.json

@@ -4,7 +4,9 @@
   "description": "Official MinIO documentation",
   "main": "index.rst",
   "scripts": {
+    "watch": "gulp watch",
     "build": "gulp",
+    "gulp": "gulp",
     "test": "echo \"Error: no test specified\" && exit 1"
   },
   "repository": {
@@ -20,14 +22,12 @@
   "devDependencies": {
     "gulp": "^4.0.2",
     "gulp-autoprefixer": "^7.0.1",
+    "gulp-clean-css": "^4.3.0",
     "gulp-connect": "^5.7.0",
-    "gulp-cssmin": "^0.2.0",
     "gulp-load-plugins": "^2.0.4",
     "gulp-rename": "^2.0.0",
     "gulp-sass": "^4.1.0",
     "gulp-terser": "^2.0.1",
-    "gulp-watch": "^5.0.1",
-    "gulp-webserver": "^0.9.1",
     "node-sass": "^4.14.1"
   },
   "browserslist": [