Bump serve-static from 1.15.0 to 1.16.0

Bumps [serve-static](https://github.com/expressjs/serve-static) from 1.15.0 to 1.16.0.
- [Release notes](https://github.com/expressjs/serve-static/releases)
- [Changelog](https://github.com/expressjs/serve-static/blob/master/HISTORY.md)
- [Commits](expressjs/serve-static@v1.15.0...1.16.0)

---
updated-dependencies:
- dependency-name: serve-static
  dependency-type: direct:development
...

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

package.json

@@ -157,7 +157,7 @@
     "recast": "^0.22.0",
     "rollup": "^4.2.0",
     "rsvp": "^4.8.5",
-    "serve-static": "^1.14.2",
+    "serve-static": "^1.16.0",
     "simple-dom": "^1.4.0",
     "testem": "^3.10.1",
     "testem-failure-only-reporter": "^1.0.0",