Update grunt v1.0.0

Author: t32k

package.json

@@ -1,7 +1,7 @@
 {
   "name": "grunt-csso",
   "description": "Minify CSS files with CSSO.",
-  "version": "0.8.2",
+  "version": "1.0.0",
   "homepage": "https://github.com/t32k/grunt-csso",
   "author": {
     "name": "Koji Ishimoto",
@@ -15,28 +15,31 @@
   "bugs": {
     "url": "https://github.com/t32k/grunt-csso/issues"
   },
-  "license": "MIT",
   "engines": {
     "node": ">=0.12.0"
   },
   "scripts": {
+    "grunt": "grunt",
     "test": "grunt test"
   },
+  "peerDependencies": {
+    "grunt": ">=0.4.0"
+  },
   "dependencies": {
-    "chalk": "^1.1.1",
-    "csso": "^1.6.1",
+    "chalk": "^1.1.3",
+    "csso": "^1.8.1",
     "maxmin": "^2.1.0"
   },
   "devDependencies": {
-    "grunt": "^0.4.5",
-    "grunt-cli": "^0.1.13",
+    "grunt": "^1.0.0",
     "grunt-contrib-clean": "^1.0.0",
-    "grunt-contrib-nodeunit": "^0.4.1"
+    "grunt-contrib-nodeunit": "^1.0.0"
   },
   "keywords": [
     "gruntplugin",
     "minifier",
     "optimize",
     "csso"
-  ]
+  ],
+  "license": "MIT"
 }