[Snyk] Fix for 1 vulnerabilities

[snyk-bot]

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:
  • skycoin-messenger/web/package.json
  • skycoin-messenger/web/package-lock.json

Vulnerabilities that will be fixed

With an upgrade:

Severity	Title	Issue ID	Breaking Change
	Prototype Pollution	SNYK-JS-HANDLEBARS-534988	Yes

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

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