Update package.json

package.json

 {
   "name": "markdown-it-imsize",
-  "version": "1.1.1",
+  "version": "1.1.2",
   "description": "Markdown-it plugin to specify image size",
   "main": "lib/index.js",
   "scripts": {
@@ -20,16 +20,16 @@
     "markdown-it",
     "markdown-it-plugin"
   ],
-  "dependencies": {
-    "image-size": "^0.3.5"
-  },
+  "dependencies": {},
   "devDependencies": {
-    "markdown-it": "^3.0.4",
-    "markdown-it-testgen": "^0.1.4",
     "coveralls": "^2.11.2",
     "eslint": "^0.13.0",
     "eslint-plugin-nodeca": "^1.0.3",
     "istanbul": "^0.3.5",
-    "mocha": "^2.1.0"
+    "markdown-it": "^3.0.4",
+    "markdown-it-testgen": "^0.1.4",
+    "mocha": "^2.1.0",
+    "uglify-js": "^2.4.16",
+    "webpack": "^1.5.3"
   }
 }