[Snyk] Security upgrade nconf from 0.8.5 to 0.12.0

[mrvautin]

This PR was automatically created by Snyk using the credentials of a real user.

Snyk has created this PR to fix one or more vulnerable packages in the `npm` dependencies of this project.

 #### Changes included in this PR - Changes to the following files to upgrade the vulnerable dependencies to a fixed version: - package.json #### Vulnerabilities that will be fixed ##### With an upgrade: Severity | Priority Score (*) | Issue | Breaking Change | Exploit Maturity :-------------------------:|-------------------------|:-------------------------|:-------------------------|:-------------------------  | **768/1000**
**Why?** Proof of Concept exploit, Recently disclosed, Has a fix available, CVSS 7.5 | Prototype Pollution
[SNYK-JS-ASYNC-2441827](https://snyk.io/vuln/SNYK-JS-ASYNC-2441827) | No | Proof of Concept (*) Note that the real score may have changed since the PR was raised.

Commit messages

Package name: nconf

The new version differs by 41 commits.

• 583e713 0.12.0
• 60c99cd chore: upgrade to nyc for test coverage (#400)
• 080624a [dist] Update dependency async to v3 (#332) (#399)
• f1ddb1b fix(ci): use npm install w/o package-lock
• f25feb2 0.11.4
• 2e9e453 chore: disable package-lock, since this is a lib
• 7aa9402 chore: update node version test matrix
• feaba56 fix(security): prevent prototype pollution in memory store (#397)
• 218059e 0.11.3
• dc8c3d6 Handle case where parsed config object hasn't prototype (#365)
• b1914ae 0.11.2
• 54bd403 chore: upgrade deps to fix security vulns
• e6dfa5d 0.11.1
• 709cc60 Bump node-notifier from 8.0.0 to 8.0.1 (#355)
• eca2bf3 Bump ini from 1.3.5 to 1.3.6 (#353)
• 85229df chore: enable circleci
• 91e9106 chore: update changelog
• 4122731 0.11.0
• 56794d1 chore: upgrade deps to fix security vulns
• 1392ac4 0.10.0
• 01f25fa Regex as env separator (#288)
• 16667be Argv store separator (#291)
• bac910a 0.9.1
• 2bdf7e1 Clean Argv Store options (#290)

See the full diff

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