Bump nconf from 0.10.0 to 0.11.4

Bumps [nconf](https://github.com/flatiron/nconf) from 0.10.0 to 0.11.4.
- [Release notes](https://github.com/flatiron/nconf/releases)
- [Changelog](https://github.com/indexzero/nconf/blob/master/CHANGELOG.md)
- [Commits](indexzero/nconf@0.10.0...v0.11.4)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -35,7 +35,7 @@
     "ejs": "^2.5.2",
     "express": "^4.14.0",
     "json-schema-to-openapi-schema": "^0.3.0",
-    "nconf": "^0.10.0",
+    "nconf": "^0.11.4",
     "nconf-yaml": "^1.0.2",
     "node-fetch": "^2.3.0",
     "node-readfiles": "^0.2.0",