[Snyk] Security upgrade mongoose from 5.10.5 to 5.11.7

[snyk-bot]

Snyk has created this PR to fix one or more vulnerable packages in the `yarn` 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
  • yarn.lock

Vulnerabilities that will be fixed

With an upgrade:

Severity	Priority Score (*)	Issue	Breaking Change	Exploit Maturity
	651/1000 Why? Recently disclosed, Has a fix available, CVSS 7.3	Prototype Pollution SNYK-JS-MQUERY-1050858	No	No Known Exploit

(*) Note that the real score may have changed since the PR was raised.

Check the changes in this PR to ensure they won't cause issues with your project.

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For more information:
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📚 Read more about Snyk's upgrade and patch logic

[coveralls]

Coverage remained the same at 86.631% when pulling 8a3ff9c on snyk-fix-290fbb8aa22b33bf4bfb1ef626764c93 into cee8eba on master.