chore(deps): update dependency semver to v5.5.0 (#499)

This Pull Request updates dependency [semver](https://github.com/npm/node-semver) from `v5.3.0` to `v5.5.0`



<details>
<summary>Release Notes</summary>

### [`v5.5.0`](npm/node-semver@v5.4.1...v5.5.0)
[Compare Source](npm/node-semver@v5.4.1...v5.5.0)


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### [`v5.4.1`](npm/node-semver@v5.4.0...v5.4.1)
[Compare Source](npm/node-semver@v5.4.0...v5.4.1)


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### [`v5.4.0`](npm/node-semver@v5.3.0...v5.4.0)
[Compare Source](npm/node-semver@v5.3.0...v5.4.0)


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</details>




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This PR has been generated by [Renovate Bot](https://renovatebot.com).

Author: renovate[bot]

package-lock.json

@@ -69,7 +69,7 @@
     "nyc": "10.3.2",
     "proxyquire": "1.8.0",
     "semantic-release": "6.3.5",
-    "semver": "5.3.0",
+    "semver": "5.5.0",
     "sinon": "1.17.6"
   },
   "dependencies": {