Adjust CI Matrix Ruby Version to 3.0+ to align with gemspec (#1499)

Co-authored-by: fatkodima <fatkodima123@gmail.com>

.github/workflows/test.yml

@@ -63,11 +63,14 @@ jobs:
 
         # To keep matrix size down, only test highest and lowest rubies.
         # See "Lowest supported ruby version" in CONTRIBUTING.md
-        ruby: [ '3.1', '3.3' ]
+        ruby: [ '3.0', '3.3' ]
         exclude:
           # Rails 8 requires ruby 3.2+.
           - gemfile: 'rails_8.0'
-            ruby: '3.1'
+            ruby: '3.0'
+          # Rails 7.2 requires ruby 3.1+.
+          - gemfile: 'rails_7.2'
+            ruby: '3.0'
     steps:
       - name: Checkout source
         uses: actions/checkout@v4

README.md

@@ -93,10 +93,11 @@ Choose version:
 
 | paper_trail | ruby     | activerecord  |
 |-------------|----------|---------------|
-| unreleased  | >= 3.1.0 | >= 6.1, <= 8.0 |
-| 15.2        | >= 3.1.0 | >= 6.1, <= 7.2 |
-| 15.1        | >= 3.1.0 | >= 6.1, <= 7.1 |
-| 15          | >= 3.0.0 | >= 6.1, < 7.2 |
+| unreleased  | >= 3.0.0 | >= 6.1, <= 8.0 |
+| 16          | >= 3.0.0 | >= 6.1, <= 8.0 |
+| 15.2        | >= 3.0.0 | >= 6.1, <= 7.2 |
+| 15.1        | >= 3.0.0 | >= 6.1, <= 7.1 |
+| 15          | >= 3.0.0 | >= 6.1, <= 7.1 |
 | 14          | >= 2.7.0 | >= 6.0, < 7.1 |
 | 13          | >= 2.6.0 | >= 5.2, < 7.1 |
 | 12          | >= 2.6.0 | >= 5.2, < 7.1 |