Exit with -1 if EOL repos are present

Partially closes #11

Author: MatheusRich

CHANGELOG.md

@@ -2,23 +2,24 @@
 
 ### Added
 
-- Allow specifying the user used on the repository search
+- Allow specifying the user used on the repository search.
 
 ```sh
 $ end_of_life --user=matz # searches on matz's repositories
 ```
 
 ### Fixed
 
-- Load end_of_life JSON database from dynamic path [#10](https://github.com/MatheusRich/end_of_life/pull/10)
+- Load end_of_life JSON database from dynamic path [#10](https://github.com/MatheusRich/end_of_life/pull/10).
 
   When installed on a fresh Ruby installation without the source code cloned,
   the JSON file couldn't be found because it was looking at the cwd of the
   running process instead of the Gem's lib directory path.
 
-
 ### Changed
 
+- Exit with -1 if EOL repos are present.
+
 - Upgrade `octokit` to v4.22, which fixes [a Faraday warning], so we can remove the dependency on the `warning` gem.
 
 [a faraday warning]: https://github.com/octokit/octokit.rb/pull/1359

lib/end_of_life.rb

@@ -94,6 +94,7 @@ def print_diagnose_for(repositories)
 
       puts "Found #{repositories.size} repositories using EOL Ruby (<= #{RubyVersion::EOL}):"
       puts end_of_life_table(repositories)
+      exit(-1)
     end
 
     def end_of_life_table(repositories)