feat: bump minimum Ruby to 3.2 (3.1 is EOL)

public_suffix 7.x requires Ruby >= 3.2, and Ruby 3.1 reached end of
life in March 2025.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: SeanLF

.github/workflows/rspec.yml

@@ -13,7 +13,7 @@ jobs:
   test:
     strategy:
        matrix:
-         ruby: ['3.1', '3.2', '3.3', '3.4', '4.0', head]
+         ruby: ['3.2', '3.3', '3.4', '4.0', head]
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4

CHANGELOG.md

@@ -21,6 +21,7 @@
 - **BREAKING:** Markdown table collapsed from 12 to 9 columns (dates inlined with versions)
 - Replace `activesupport` with lightweight `CoreExt` refinement
 - Remove unused `async-http` dependency (82 -> 66 installed gems)
+- **BREAKING:** Bump minimum Ruby version to 3.2 (3.1 is EOL)
 - Rename "Scorecard" column to "OpenSSF" for clarity
 - Extract shared HTTP helper from DepsDevClient and GitlabClient
 - Consolidate VCR test configuration into spec_helper

still_active.gemspec

@@ -15,7 +15,7 @@ Gem::Specification.new do |spec|
     "Outputs coloured terminal tables, markdown, or JSON with CI gating support."
   spec.homepage      = "https://github.com/SeanLF/still_active"
   spec.license       = "MIT"
-  spec.required_ruby_version = ">= 3.1.0"
+  spec.required_ruby_version = ">= 3.2.0"
 
   spec.metadata["homepage_uri"] = spec.homepage
   spec.metadata["source_code_uri"] = spec.homepage