chore(package): update http-server to version 0.12.3

Closes #177

Author: greenkeeper[bot]

package.json

@@ -48,7 +48,7 @@
     "canonical-path": "0.0.2",
     "concurrently": "^3.5.0",
     "core-js": "^2.4.1",
-    "http-server": "^0.11.0",
+    "http-server": "^0.12.3",
     "jasmine-core": "~2.8.0",
     "karma": "^2.0.0",
     "karma-chrome-launcher": "^2.0.0",