Gemfile in u-service-0.5.0 vs Gemfile in u-service-0.6.0

@@ -1,10 +1,23 @@
 source "https://rubygems.org"
 
 git_source(:github) {|repo_name| "https://github.com/#{repo_name}" }
 
-# Specify your gem's dependencies in micro-service.gemspec
-gemspec
+activemodel_version = ENV.fetch('ACTIVEMODEL_VERSION', '6.1')
 
+activemodel = case activemodel_version
+              when '3.2' then '3.2.22'
+              when '5.2' then '5.2.3'
+              end
+
+if activemodel_version < '6.1'
+  gem 'activemodel', activemodel, require: false
+  gem 'activesupport', activemodel, require: false
+end
+
 group :test do
+  gem 'minitest', activemodel_version < '4.1' ? '~> 4.2' : '~> 5.0'
   gem 'simplecov', require: false
 end
+
+# Specify your gem's dependencies in micro-service.gemspec
+gemspec