Update and test supported Ruby/Rails versions (#25)

Author: mlarraz

.github/workflows/CI.yml

@@ -12,8 +12,11 @@ jobs:
     strategy:
       matrix:
         ruby:
-          - 2.6
-          - 2.7
+          - '2.6'
+          - '2.7'
+        activerecord:
+          - '5.2'
+          - '6.0'
     services:
       postgres:
         image: postgres:12
@@ -28,7 +31,9 @@ jobs:
           --health-timeout 5s
           --health-retries 5
 
-    name: Ruby ${{ matrix.ruby }}
+    name: Ruby ${{ matrix.ruby }} / ActiveRecord ${{ matrix.activerecord }}
+    env:
+      BUNDLE_GEMFILE: gemfiles/activerecord_${{ matrix.activerecord }}.gemfile
     steps:
       - uses: actions/checkout@v2
       - run: |

.gitignore

@@ -7,3 +7,5 @@
 /pkg/
 /spec/reports/
 /tmp/
+gemfiles/*.lock
+*.log

amountable.gemspec

@@ -15,10 +15,9 @@ Gem::Specification.new do |gem|
   gem.files         = `git ls-files`.split($/)
   gem.test_files    = gem.files.grep(%r{^spec/})
   gem.require_paths = ['lib']
-  gem.required_ruby_version     = '>= 2.1.1'
+  gem.required_ruby_version     = '>= 2.6'
 
-  gem.add_dependency 'activerecord', '>= 4.1', '< 6.1'
-  gem.add_dependency 'activesupport', '>= 4.1'
+  gem.add_dependency 'activerecord', '>= 5.2', '< 6.1'
   gem.add_dependency 'activerecord-import', '>= 0.19.1'
   gem.add_dependency 'money-rails', '>=1.7.0'
   gem.add_dependency 'monetize'

gemfiles/activerecord_5.2.gemfile

@@ -0,0 +1,5 @@
+source "https://rubygems.org"
+
+gemspec path: "../"
+
+gem "activerecord", "~> 5.2.0"

gemfiles/activerecord_6.0.gemfile

@@ -0,0 +1,5 @@
+source "https://rubygems.org"
+
+gemspec path: "../"
+
+gem "activerecord", "~> 6.0.0"