Update ruby_dep requirement from 1.3.1 to 1.5.0 (#605)

Updates the requirements on [ruby_dep](https://github.com/e2/ruby_dep) to permit the latest version.
- [Release notes](https://github.com/e2/ruby_dep/releases)
- [Commits](e2/ruby_dep@v1.3.1...v1.5.0)

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

Author: dependabot[bot]

Gemfile

@@ -27,7 +27,7 @@ group :development, :test do
   gem 'coveralls'
 
   gem 'overcommit'
-  gem 'ruby_dep', '1.3.1'
+  gem 'ruby_dep', '1.5.0'
 
   platforms :mri, :mingw do
     gem 'pry', require: false