5.1.gemfile in rails_compatibility-0.0.3

- old
+ new

@@ -1,10 +1,10 @@
 source 'https://rubygems.org'
 
 gem 'activerecord', '~> 5.1.0'
 
 group :test do
-  gem 'simplecov'
+  gem 'simplecov', '< 0.18'
   gem 'sqlite3', '~> 1.3.6'
 end
 
 gemspec path: '../'