Update debug requirement from ~> 1.0.0 to ~> 1.6.2 in /updater

Updates the requirements on [debug](https://github.com/ruby/debug) to permit the latest version.
- [Release notes](https://github.com/ruby/debug/releases)
- [Commits](ruby/debug@v1.0.0...v1.6.2)

---
updated-dependencies:
- dependency-name: debug
  dependency-type: direct:development
...

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

Author: dependabot[bot]

updater/Gemfile

@@ -27,7 +27,7 @@ gem "sentry-raven", "~> 3.1"
 gem "terminal-table", "~> 3.0.2"
 
 group :test do
-  gem "debug", "~> 1.0.0"
+  gem "debug", "~> 1.6.2"
   gem "rspec", "~> 3.11"
   gem "rubocop", "~> 1.36.0"
   gem "rubocop-performance", "~> 1.15.0"