Update dependency nconf to v0.11.3

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
nconf	0.10.0 -> 0.11.3

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Release Notes

flatiron/nconf

### [`v0.11.3`](https://togithub.com/flatiron/nconf/releases/v0.11.3) [Compare Source](https://togithub.com/flatiron/nconf/compare/v0.11.2...v0.11.3) Fixes: - Handle case where parsed config object doesn't have a prototype ([#​365](https://togithub.com/flatiron/nconf/issues/365)) ([@​ilkkao](https://togithub.com/ilkkao)) ### [`v0.11.2`](https://togithub.com/flatiron/nconf/releases/v0.11.2) [Compare Source](https://togithub.com/flatiron/nconf/compare/v0.11.1...v0.11.2) This release resolves several security vulnerabilities by upgrading underlying packages. ### [`v0.11.1`](https://togithub.com/flatiron/nconf/releases/v0.11.1) [Compare Source](https://togithub.com/flatiron/nconf/compare/v0.11.0...v0.11.1) This release resolves several security vulnerabilities by upgrading underlying packages. ### [`v0.11.0`](https://togithub.com/flatiron/nconf/releases/v0.11.0) [Compare Source](https://togithub.com/flatiron/nconf/compare/v0.10.0...v0.11.0) This release resolves several security vulnerabilities by upgrading underlying packages. **WARNING:** Due to upstream packages updates, this may cause issues with older Node.js versions (e.g. Node.js v8.x). Those older Node releases are out of support anyway, so you shouldn't use them, but be aware of this possibility.

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