[Snyk] Security upgrade i18next from 19.4.5 to 19.6.0

[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	Issue	Breaking Change	Exploit Maturity
	Prototype Pollution SNYK-JS-I18NEXT-585930	No	Proof of Concept

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

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[codeclimate[bot]]

Code Climate has analyzed commit 09a2db81 and detected 0 issues on this pull request.

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[ivan-aksamentov]

Closing in favor #762