Update dependencies

* bootlint ^1.1.0
* grunt 1.0.4 (locked down for Node.js 6.x support)
* grunt-contrib-nodeunit ^2.1.0

package.json

@@ -27,14 +27,14 @@
     "test": "grunt test"
   },
   "dependencies": {
-    "bootlint": "^1.0.0",
+    "bootlint": "^1.1.0",
     "chalk": "^2.4.2",
     "micromatch": "^3.1.10"
   },
   "devDependencies": {
-    "grunt": "^1.0.4",
+    "grunt": "1.0.4",
     "grunt-contrib-clean": "^2.0.0",
-    "grunt-contrib-nodeunit": "^2.0.0",
+    "grunt-contrib-nodeunit": "^2.1.0",
     "grunt-eslint": "^21.1.0"
   }
 }