Update benchmark-ips requirement from ~> 2.13.0 to ~> 2.14.0 (#604)

Updates the requirements on [benchmark-ips](https://github.com/evanphx/benchmark-ips) to permit the latest version.
- [Release notes](https://github.com/evanphx/benchmark-ips/releases)
- [Changelog](https://github.com/evanphx/benchmark-ips/blob/master/History.md)
- [Commits](evanphx/benchmark-ips@v2.13.0...v2.14.0)

---
updated-dependencies:
- dependency-name: benchmark-ips
  dependency-type: direct:production
...

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benchmark/compare_with_othergems/abachman/Gemfile

@@ -3,4 +3,4 @@
 source('https://rubygems.org')
 
 gem('ulid-ruby', '1.0.2')
-gem('benchmark-ips', '~> 2.13.0')
+gem('benchmark-ips', '~> 2.14.0')