[Snyk] Fix for 5 vulnerabilities

[snyk-bot]

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

Changes included in this PR

• Changes to the following files to upgrade the vulnerable dependencies to a fixed version:
  • Gemfile
  • Gemfile.lock

Vulnerabilities that will be fixed

With an upgrade:

Severity	Issue	Breaking Change	Exploit Maturity
	Cross-site Request Forgery (CSRF) SNYK-RUBY-ACTIONPACK-569599	No	No Known Exploit
	Information Exposure SNYK-RUBY-ACTIONPACK-569600	No	No Known Exploit
	Cross-site Request Forgery (CSRF) SNYK-RUBY-ACTIONVIEW-569601	No	No Known Exploit
	Deserialization of Untrusted Data SNYK-RUBY-ACTIVESUPPORT-569598	No	No Known Exploit
	Directory Traversal SNYK-RUBY-RACK-569066	No	No Known Exploit

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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[houndci-bot]

Some files could not be reviewed due to errors:

.rubocop.yml: Style/IndentArray has the wrong namespace - should be Layout

.rubocop.yml: Style/IndentArray has the wrong namespace - should be Layout
Error: The `Style/TrailingCommaInLiteral` cop no longer exists. Please use `Style/TrailingCommaInArrayLiteral` and/or `Style/TrailingCommaInHashLiteral` instead.
(obsolete configuration found in .rubocop.yml, please update it)