Bump devDependencies.

package.json

@@ -32,7 +32,7 @@
   },
   "devDependencies": {
     "btoa": "~1.1.2",
-    "glob": "~4.4.0",
+    "glob": "~5.0.3",
     "grunt": "~0.4.5",
     "grunt-autoprefixer": "~2.2.0",
     "grunt-banner": "~0.3.1",
@@ -51,13 +51,13 @@
     "grunt-contrib-watch": "~0.6.1",
     "grunt-csscomb": "~3.0.0",
     "grunt-exec": "~0.4.6",
-    "grunt-html": "~3.0.0",
+    "grunt-html": "~4.0.1",
     "grunt-jekyll": "~0.4.2",
     "grunt-jscs": "~1.5.0",
     "grunt-saucelabs": "~8.6.0",
     "grunt-sed": "~0.1.1",
     "load-grunt-tasks": "~3.1.0",
-    "markdown-it": "^3.0.7",
+    "markdown-it": "^4.0.1",
     "npm-shrinkwrap": "^200.1.0",
     "time-grunt": "^1.1.0"
   },