Update dependencies, Remove unused greenkeeper entry

package.json

@@ -13,11 +13,11 @@
     "mkdirp": "^0.5.1",
     "remarkable": "^1.7.1",
     "requirejs": "2.1.22",
-    "yargs": "^11.0.0"
+    "yargs": "^12.0.1"
   },
   "devDependencies": {
     "@alrra/travis-scripts": "^3.0.1",
-    "eslint": "^4.19.1",
+    "eslint": "^5.0.1",
     "eslint-plugin-jsdoc": "^3.7.1",
     "expect.js": "^0.3.1",
     "grunt": "^1.0.3",
@@ -27,7 +27,7 @@
     "grunt-contrib-pug": "^1.0.0",
     "grunt-coveralls": "^2.0.0",
     "grunt-env": "^0.4.4",
-    "grunt-eslint": "^20.2.0",
+    "grunt-eslint": "^21.0.0",
     "grunt-istanbul": "^0.8.0",
     "grunt-mocha": "0.4.15",
     "grunt-mocha-test": "^0.13.3",
@@ -62,8 +62,10 @@
     }
   },
   "keywords": [
+    "modernizr",
     "html5",
     "css3",
+    "javascript",
     "browser",
     "feature detection"
   ],
@@ -101,11 +103,5 @@
       "url": "https://twitter.com/doctyper"
     }
   ],
-  "greenkeeper": {
-    "ignore": [
-      "joi",
-      "grunt-eslint"
-    ]
-  },
   "license": "MIT"
 }