Update pry requirement from ~> 0.14.1 to ~> 0.15.0

Updates the requirements on [pry](https://github.com/pry/pry) to permit the latest version.
- [Release notes](https://github.com/pry/pry/releases)
- [Changelog](https://github.com/pry/pry/blob/master/CHANGELOG.md)
- [Commits](pry/pry@v0.14.1...v0.15.0)

---
updated-dependencies:
- dependency-name: pry
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile

@@ -5,7 +5,7 @@ source 'https://rubygems.org'
 gemspec
 
 gem "gc_ruboconfig", "~> 3.6.0"
-gem "pry", "~> 0.14.1"
+gem "pry", "~> 0.15.0"
 gem "rake", "~> 13.0"
 gem "rspec", "~> 3.13.0"
 gem "rspec-its", "~> 1.3.0"