Update devDependencies.

Keep grunt-contrib-qunit to v0.7.0 since the updated version (1.0.1 as the time of writing) results in Travis failures. Locally, both work fine, though.

package.json

@@ -30,34 +30,34 @@
   "license": "MIT",
   "devDependencies": {
     "btoa": "~1.1.2",
-    "glob": "~6.0.1",
+    "glob": "~7.0.3",
     "grunt": "~0.4.5",
-    "grunt-autoprefixer": "~3.0.3",
-    "grunt-contrib-clean": "~0.7.0",
-    "grunt-contrib-compress": "~0.14.0",
-    "grunt-contrib-concat": "~0.5.1",
-    "grunt-contrib-connect": "~0.11.2",
-    "grunt-contrib-copy": "~0.8.0",
-    "grunt-contrib-csslint": "~0.5.0",
-    "grunt-contrib-cssmin": "~0.14.0",
-    "grunt-contrib-htmlmin": "~0.6.0",
-    "grunt-contrib-jade": "~0.15.0",
-    "grunt-contrib-jshint": "~0.11.2",
-    "grunt-contrib-less": "~1.1.0",
+    "grunt-autoprefixer": "~3.0.4",
+    "grunt-contrib-clean": "~1.0.0",
+    "grunt-contrib-compress": "~1.1.1",
+    "grunt-contrib-concat": "~1.0.0",
+    "grunt-contrib-connect": "~1.0.0",
+    "grunt-contrib-copy": "~1.0.0",
+    "grunt-contrib-csslint": "~1.0.0",
+    "grunt-contrib-cssmin": "~1.0.0",
+    "grunt-contrib-htmlmin": "~1.0.0",
+    "grunt-contrib-jade": "~1.0.0",
+    "grunt-contrib-jshint": "~1.0.0",
+    "grunt-contrib-less": "~1.2.0",
     "grunt-contrib-qunit": "~0.7.0",
-    "grunt-contrib-uglify": "~0.11.0",
+    "grunt-contrib-uglify": "~1.0.0",
     "grunt-contrib-watch": "~0.6.1",
     "grunt-csscomb": "~3.1.0",
     "grunt-exec": "~0.4.6",
-    "grunt-html": "~5.0.1",
-    "grunt-jekyll": "~0.4.2",
-    "grunt-jscs": "~2.5.0",
-    "grunt-saucelabs": "~8.6.1",
-    "load-grunt-tasks": "~3.4.0",
-    "markdown-it": "^5.0.0",
+    "grunt-html": "~6.0.0",
+    "grunt-jekyll": "~0.4.4",
+    "grunt-jscs": "~2.8.0",
+    "grunt-saucelabs": "~8.6.2",
+    "load-grunt-tasks": "~3.4.1",
+    "markdown-it": "^6.0.0",
     "npm-shrinkwrap": "^200.4.0",
-    "shelljs": "^0.5.3",
-    "time-grunt": "^1.2.1"
+    "shelljs": "^0.6.0",
+    "time-grunt": "^1.3.0"
   },
   "engines": {
     "node": ">=0.10.1"