Updates workflow to run against rails versions (#214)

Author: cgranleese-r7

.github/workflows/verify.yml

@@ -50,6 +50,9 @@ jobs:
           - '3.0'
           - '3.1'
           - '3.2'
+        rails:
+          - '~> 7.0.0'
+          - '~> 7.1.0'
         os:
           - ubuntu-20.04
           - ubuntu-latest
@@ -60,7 +63,7 @@ jobs:
     env:
       RAILS_ENV: test
 
-    name: ${{ matrix.os }} - Ruby ${{ matrix.ruby }}
+    name: ${{ matrix.os }} - Ruby ${{ matrix.ruby }} - Rails ${{ matrix.rails }}
     steps:
       - name: Install system dependencies
         run: sudo apt-get install libpcap-dev graphviz
@@ -74,6 +77,12 @@ jobs:
           ruby-version: ${{ matrix.ruby }}
           bundler-cache: true
 
+      - name: Update Rails version
+        run: |
+          ruby -pi.bak -e "gsub(/gem ['\"]rails['\"],\s*['\"].+['\"]?/, \"gem 'rails', '${{ matrix.rails }}'\")" Gemfile
+          bundle update
+          bundle install
+
       - name: Test
         run: |
           cp spec/dummy/config/database.yml.github_actions spec/dummy/config/database.yml