package.json in reveal-ck-4.0.0

- old
+ new

@@ -1,8 +1,8 @@
 {
   "name": "reveal.js",
-  "version": "3.7.0",
+  "version": "3.9.2",
   "description": "The HTML Presentation Framework",
   "homepage": "http://revealjs.com",
   "subdomain": "revealjs",
   "main": "js/reveal.js",
   "scripts": {
@@ -18,26 +18,27 @@
   "repository": {
     "type": "git",
     "url": "git://github.com/hakimel/reveal.js.git"
   },
   "engines": {
-    "node": ">=4.0.0"
+    "node": ">=9.0.0"
   },
   "devDependencies": {
     "express": "^4.16.2",
-    "grunt": "^1.0.1",
+    "grunt": "^1.0.4",
     "grunt-autoprefixer": "^3.0.4",
-    "grunt-cli": "^1.2.0",
-    "grunt-contrib-connect": "^1.0.2",
-    "grunt-contrib-cssmin": "^2.2.1",
-    "grunt-contrib-jshint": "^1.1.0",
-    "grunt-contrib-qunit": "^2.0.0",
+    "grunt-cli": "^1.3.2",
+    "grunt-contrib-connect": "^2.0.0",
+    "grunt-contrib-cssmin": "^3.0.0",
+    "grunt-contrib-jshint": "^2.0.0",
+    "grunt-contrib-qunit": "^3.1.0",
     "grunt-contrib-uglify": "^3.3.0",
-    "grunt-contrib-watch": "^1.0.0",
-    "grunt-sass": "^2.0.0",
-    "grunt-retire": "^1.0.7",
+    "grunt-contrib-watch": "^1.1.0",
+    "grunt-sass": "^3.0.2",
     "grunt-zip": "~0.17.1",
+    "load-grunt-tasks": "^4.0.0",
     "mustache": "^2.3.0",
-    "socket.io": "^1.7.3"
+    "node-sass": "^4.13.1",
+    "socket.io": "^2.2.0"
   },
   "license": "MIT"
 }