Use matrix to test different ruby versions

.github/workflows/main.yml

@@ -5,12 +5,16 @@ on: [push,pull_request]
 jobs:
   build:
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        ruby-version: ['2.7', '3.0', '3.1', '3.2', '3.3', '3.4']
+
     steps:
     - uses: actions/checkout@v4
-    - name: Set up Ruby
+    - name: Set up Ruby ${{ matrix.ruby-version }}
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: 3.4.1
+        ruby-version: ${{ matrix.ruby-version }}
     - name: Run the default task
       run: |
         bundle install

Gemfile.lock

@@ -2,13 +2,16 @@ PATH
   remote: .
   specs:
     omni_exchange (2.1.0)
+      bigdecimal (~> 3)
       faraday (~> 2)
       money (~> 6.13.1)
+      stringio (~> 3.1)
 
 GEM
   remote: https://rubygems.org/
   specs:
     ast (2.4.2)
+    bigdecimal (3.1.9)
     coderay (1.1.3)
     concurrent-ruby (1.3.5)
     diff-lcs (1.5.0)
@@ -63,6 +66,7 @@ GEM
     rubocop-ast (1.21.0)
       parser (>= 3.1.1.0)
     ruby-progressbar (1.11.0)
+    stringio (3.1.2)
     unicode-display_width (1.8.0)
     uri (1.0.2)
     vcr (6.1.0)

lib/omni_exchange.rb

@@ -2,7 +2,7 @@
 
 require 'omni_exchange/provider'
 # in order to make sure that all API data providers are registered correctly,
-#   all of the provider files in the providers folder must be required
+# all of the provider files in the providers folder must be required
 require 'omni_exchange/providers/open_exchange_rates'
 require 'omni_exchange/providers/xe'
 require 'omni_exchange/version'
@@ -11,7 +11,7 @@
 require 'faraday'
 require 'money'
 require 'json'
-require 'bigdecimal/util'
+require 'bigdecimal'
 require 'net/http'
 
 # rubocop:disable Lint/Syntax

omni_exchange.gemspec

@@ -12,7 +12,7 @@ Gem::Specification.new do |spec|
   spec.description   = 'OmniExchange converts currencies using up-to-the-minute foreign exchange rates.'
   spec.homepage      = 'https://degica.com'
   spec.license       = 'MIT'
-  spec.required_ruby_version = Gem::Requirement.new('>= 2.3.0')
+  spec.required_ruby_version = Gem::Requirement.new('>= 3.0.0')
 
   spec.metadata['allowed_push_host'] = 'https://rubygems.org'
 
@@ -29,6 +29,8 @@ Gem::Specification.new do |spec|
 
   spec.add_dependency 'faraday', '~> 2'
   spec.add_dependency 'money', '~> 6.13.1'
+  spec.add_dependency 'bigdecimal', '~> 3'
+  spec.add_dependency 'stringio', '~> 3.1'
 
   spec.add_development_dependency 'dotenv'
   spec.add_development_dependency 'pry'