chore(package): update esdoc to version 1.0.0-alpha.1

https://greenkeeper.io/

Author: greenkeeper[bot]

package.json

@@ -40,7 +40,7 @@
     "babel-preset-latest": "^6.16.0",
     "codeclimate-test-reporter": "^0.4.0",
     "coveralls": "^2.11.15",
-    "esdoc": "^0.5.1",
+    "esdoc": "^1.0.0-alpha.1",
     "nyc": "^10.0.0"
   },
   "homepage": "http://aureooms.github.io/js-collections-defaultdict/",