Autodetect version tags

Towards coreinfrastructure#2139. Still draft because it needs updates to the
unit tests (/VCR) but I ran into problems with the chrome
integration of the tests.

Signed-off-by: Arnout Engelen <[email protected]>

Author: raboof

app/lib/github_basic_detective.rb

@@ -20,6 +20,7 @@ class GithubBasicDetective < Detective
   OUTPUTS = %i[
     name license discussion_status repo_public_status repo_track_status
     repo_distributed_status contribution_status implementation_languages
+    version_tags
   ].freeze
 
   # These are the 'correct' display case for SPDX for OSI-approved licenses.
@@ -170,6 +171,17 @@ def analyze(_evidence, current)
         confidence: 3,
         explanation: 'GitHub API implementation language analysis'
       }
+
+      # Check for tags
+      tag_data = client.tags fullname
+      tags = tag_data.map { |tag| tag[:name] }.sort
+      if tags.any? { |tag| tag.match?(/^v?\d+\.\d+\.\d+$/) }
+        results[:version_tags] = {
+          value: tags,
+          confidence: 2,
+          explanation: 'GitHub tags'
+        }
+      end
     end
 
     results