Bump semver from 5.7.1 to 5.7.2

Bumps [semver](https://github.com/npm/node-semver) from 5.7.1 to 5.7.2.
- [Release notes](https://github.com/npm/node-semver/releases)
- [Changelog](https://github.com/npm/node-semver/blob/v5.7.2/CHANGELOG.md)
- [Commits](npm/node-semver@v5.7.1...v5.7.2)

---
updated-dependencies:
- dependency-name: semver
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -46,7 +46,7 @@
     "requestretry": "^7.1.0",
     "s3-stream-upload": "2.0.2",
     "s3urls": "^1.5.2",
-    "semver": "5.7.1",
+    "semver": "5.7.2",
     "socks5-http-client": "^1.0.4",
     "socks5-https-client": "^1.2.1"
   },