[WALR-8621]: Bump iron bank to ruby 3.1

.github/workflows/ci.yml

@@ -13,8 +13,8 @@ jobs:
     strategy:
       matrix:
         ruby-version:
-          - '2.7'
-          - '3.0'
+          # - '2.7'
+          # - '3.0'
           - '3.1'
           - '3.2'
           - '3.3'
@@ -53,6 +53,6 @@ jobs:
       - name: Set up Ruby
         uses: zendesk/setup-ruby@v1
         with:
-          ruby-version: "3.0"
+          ruby-version: "3.1"
           bundler-cache: true
       - run: bundle exec rake rubocop

.rubocop.yml

@@ -5,7 +5,7 @@ AllCops:
   DisplayStyleGuide: true
   NewCops: enable
   SuggestExtensions: false
-  TargetRubyVersion: 2.7
+  TargetRubyVersion: 3.1
 
 Layout/DotPosition:
   EnforcedStyle: trailing
@@ -68,3 +68,15 @@ Style/RegexpLiteral:
 Style/RescueStandardError:
   Exclude:
     - lib/iron_bank/csv.rb
+
+Style/HashSyntax:
+  Exclude:
+    - spec/shared_examples/**
+    - spec/iron_bank/**/*.rb
+    - lib/iron_bank/*.
+    - lib/iron_bank/**/*.rb
+
+Style/RedundantFreeze:
+  Exclude:
+    - lib/iron_bank/*.rb
+

.ruby-version

@@ -1 +1 @@
-2.7.7
+3.1.4

iron_bank.gemspec

@@ -19,7 +19,7 @@ Gem::Specification.new do |spec|
     "[email protected]"
   ]
 
-  spec.required_ruby_version = ">= 2.7"
+  spec.required_ruby_version = ">= 3.1"
 
   spec.files = `git ls-files -z`.split("\x0").reject do |f|
     f.match(%r{^(test|spec|features)/})