[Security] Bump sprockets from 3.7.1 to 3.7.2

[dependabot-preview]

Bumps sprockets from 3.7.1 to 3.7.2. This update includes a security fix.

Vulnerabilities fixed

Sourced from The Ruby Advisory Database.

Path Traversal in Sprockets
Specially crafted requests can be used to access files that exist on
the filesystem that is outside an application's root directory, when the
Sprockets server is used in production.

All users running an affected release should either upgrade or use one of the work arounds immediately.

Workaround:
In Rails applications, work around this issue, set config.assets.compile = false and
config.public_file_server.enabled = true in an initializer and precompile the assets.

This work around will not be possible in all hosting environments and upgrading is advised.

Patched versions: >= 2.12.5, < 3.0.0; >= 3.7.2, < 4.0.0; >= 4.0.0.beta8
Unaffected versions: none

Changelog

Sourced from sprockets's changelog.

3.7.2 (June 19, 2018)

• Security release for CVE-2018-3760.

3.7.1 (December 19, 2016)

• Ruby 2.4 support for Sprockets 3.

3.7.0 (July 21, 2016)

• Deprecated interfaces now emit deprecation warnings #345

3.6.3 (July 1, 2016)

• Faster asset lookup in large directories #336
• Faster PathUtils.match_path_extname rails/sprockets@697269c
• Fixed uglifier comment stripping #326
• Error messages now show load path info #313

3.6.2 (June 21, 2016)

• More performance improvements.

3.6.1 (June 17, 2016)

• Some performance improvements.

3.6.0 (April 6, 2016)

• Add Manifest#find_sources to return the source of the compiled assets.
• Fix the list of compressable mime types.
• Improve performance of the FileStore cache.

3.5.2 (December 8, 2015)

• Fix JRuby bug with concurrent-ruby.
• Fix disabling gzip generation in cached environments.

3.5.1 (December 5, 2015)

• Fix gzip asset generation for assets already on disk.

3.5.0 (December 3, 2015)

• Reintroduce Gzip file generation for non-binary assets.

3.4.1 (November 25, 2015)

• PathUtils::Entries will no longer error on an empty directory.

... (truncated)

Commits

• 2f7b7e5 v3.7.2
• 9c34fa0 Do not respond to http requests asking for a file://
• eb0af6d Make sure find_sources behaves in the same way when the assets don't
• cfae3de Merge pull request #487 from mcfiredrill/patch-1
• dbeda82 typo in deprecation message
• See full diff in compare view

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