Bump rails from 5.1.7 to 5.2.4.1

[dependabot-preview]

Bumps rails from 5.1.7 to 5.2.4.1.

Release notes

Sourced from rails's releases.

5.2.4.1

Active Support

• No changes.

Active Model

• No changes.

Active Record

• No changes.

Action View

• No changes.

Action Pack

• Fix possible information leak / session hijacking vulnerability.

  The ActionDispatch::Session::MemcacheStore is still vulnerable given it requires the gem dalli to be updated as well.

  CVE-2019-16782.

Active Job

• No changes.

Action Mailer

• No changes.

Action Cable

... (truncated)

Commits

• ac30e38 Preparing for 5.2.4.1 release
• 2a52a38 Fix possible information leak / session hijacking vulnerability.
• 8bec77c Preparing for 5.2.4 release
• 9e2a341 Preparing for 5.2.4.rc1 release
• c192bc3 Work with old versions of sidekiq
• 21cdceb Support Ruby 2.2
• 0e54ed1 Make the tests pass in versions of ruby that don't support sprockets 4
• c11581e Use rails() instead of system()
• 606cd4f Sprockets uses debug. not self. now
• f3993f9 Link .js from manifest.js in assets_test
• Additional commits viewable in compare view

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[dependabot-preview]

Superseded by #22.