Upgrade pomelo-protocol to 0.1.4

Upgrade pomelo-protocol to 0.1.4 for [this PR](https://github.com/NetEase/pomelo-protocol/pull/5)

I think most of the dependence should add the prefix `^`,e.g.`"pomelo-protocol": "^0.1.4"`. [Here](https://www.npmjs.org/doc/misc/semver.html) is the Doc.