Drop support for Ruby 3.1 (#42496).

git-svn-id: https://svn.redmine.org/redmine/trunk@23694 e93f8b46-1217-0410-a6f0-8f06a7374b81

.github/workflows/tests.yml

@@ -10,7 +10,7 @@ jobs:
 
     strategy:
       matrix:
-        ruby: ['3.1', '3.2', '3.3', '3.4']
+        ruby: ['3.2', '3.3', '3.4']
         db: ['postgresql', 'mysql2', 'sqlite3']
       fail-fast: false
 

.rubocop.yml

@@ -1,7 +1,7 @@
 inherit_from: .rubocop_todo.yml
 
 AllCops:
-  TargetRubyVersion: 3.1
+  TargetRubyVersion: 3.2
   TargetRailsVersion: 7.2
 
   NewCops: enable

Gemfile

@@ -1,6 +1,6 @@
 source 'https://rubygems.org'
 
-ruby '>= 3.1.0', '< 3.5.0'
+ruby '>= 3.2.0', '< 3.5.0'
 
 gem 'rails', '7.2.2.1'
 gem 'rouge', '~> 4.5'

doc/INSTALL

@@ -7,7 +7,7 @@ https://www.redmine.org/
 
 == Requirements
 
-* Ruby 3.1, 3.2, 3.3, 3.4
+* Ruby 3.2, 3.3, 3.4
 
 * A database:
   * MySQL (tested with MySQL 8)