update node devDependencies

Author: slackerzz

Diff for: package.json.sample

@@ -14,29 +14,29 @@
         "grunt-autoprefixer": "~3.0.4",
         "grunt-banner": "~0.6.0",
         "grunt-continue": "~0.1.0",
-        "grunt-contrib-clean": "~1.0.0",
+        "grunt-contrib-clean": "~1.1.0",
         "grunt-contrib-connect": "~1.0.2",
-        "grunt-contrib-cssmin": "~2.0.0",
-        "grunt-contrib-imagemin": "~1.0.1",
-        "grunt-contrib-jasmine": "~1.0.0",
+        "grunt-contrib-cssmin": "~2.2.1",
+        "grunt-contrib-imagemin": "~2.0.1",
+        "grunt-contrib-jasmine": "~1.1.0",
         "grunt-contrib-less": "~1.4.1",
         "grunt-contrib-watch": "~1.0.0",
-        "grunt-eslint": "~19.0.0",
-        "grunt-exec": "~2.0.0",
+        "grunt-eslint": "~20.1.0",
+        "grunt-exec": "~3.0.0",
         "grunt-jscs": "~3.0.1",
         "grunt-replace": "~1.0.1",
         "grunt-styledocco": "~0.3.0",
         "grunt-template-jasmine-requirejs": "~0.2.3",
         "grunt-text-replace": "~0.4.0",
         "imagemin-svgo": "~5.2.1",
         "load-grunt-config": "~0.19.2",
-        "morgan": "~1.5.0",
-        "node-minify": "~2.0.3",
+        "morgan": "~1.9.0",
+        "node-minify": "~2.3.1",
         "path": "~0.12.7",
-        "serve-static": "~1.7.1",
+        "serve-static": "~1.13.1",
         "squirejs": "~0.2.1",
         "strip-json-comments": "~2.0.1",
-        "time-grunt": "~1.0.0",
-        "underscore": "~1.7.0"
+        "time-grunt": "~1.4.0",
+        "underscore": "~1.8.0"
     }
 }