[#86] Fix an incorrect auto-correct for Rails/TimeZone

[koic]

Fixes #86.

This PR fixes an incorrect auto-correct for Rails/TimeZone when using Time.new.

Before

- Time.new
+ Time.zone.new  #=> NoMethodError: undefined method `new'

- Time.new(2019, 7, 7, 10, 15, 25)
+ Time.zone.new(2019, 7, 7, 10, 15, 25) #=> NoMethodError: undefined method `new'

After

- Time.new
+ Time.zone.now

- Time.new(2019, 7, 7, 10, 15, 25)
+ Time.zone.local(2019, 7, 7, 10, 15, 25)

---

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• Wrote good commit messages.
• Commit message starts with [Fix #issue-number] (if the related issue exists).
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• Squashed related commits together.
• Added tests.
• Added an entry to the Changelog if the new code introduces user-observable changes. See changelog entry format.
• The PR relates to only one subject with a clear title
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