Upgrade sass-rails to version 5.0.7

[depfu]

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We've upgraded a dependency and here is what you need to know:

name	version specification	new version
sass-rails	< 5.0, >= 3.1.4	5.0.7

Please take a good look at the info here and the test results before merging this pull request.

What changed?

✳️ sass-rails ( → 5.0.7) · Repo

Release Notes

From the Github release:

• Remove ruby warnings

Commits

See the full diff on Github. The new version differs by 8 commits:

• Prepare for 5.0.7
• Merge pull request #403 from y-yagi/fix-ruby-warnings
• Merge pull request #404 from y-yagi/fix_broken_ci
• Remove unused session_store initializer
• Add manifest files
• Use Rails 4.2 below Ruby 2.1
• Use nokogiri 1.6.x on Ruby 2.0
• Fix ruby warning

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