fix(test): npm test fails on Windows

close vuejs#11782

Author: ygj6

Diff for: package.json

@@ -101,7 +101,7 @@
     "flow-bin": "^0.61.0",
     "hash-sum": "^1.0.2",
     "he": "^1.1.1",
-    "http-server": "^0.11.1",
+    "http-server": "^0.12.3",
     "jasmine": "^2.99.0",
     "jasmine-core": "^2.99.0",
     "karma": "^3.1.1",