Update dev-dependencies

Author: wooorm

package.json

@@ -42,11 +42,12 @@
     "istanbul": "^0.4.0",
     "jscs": "^3.0.0",
     "jscs-jsdoc": "^2.0.0",
-    "remark": "^4.0.0",
-    "remark-comment-config": "^3.0.0",
-    "remark-github": "^4.0.1",
+    "remark": "^5.0.0",
+    "remark-cli": "^1.0.0",
+    "remark-comment-config": "^4.0.0",
+    "remark-github": "^5.0.0",
     "remark-toc": "^3.0.0",
-    "remark-validate-links": "^3.0.0",
+    "remark-validate-links": "^4.0.0",
     "mocha": "^2.0.0",
     "vfile": "^1.0.0"
   },