Gemfile in rbs-0.15.0 vs Gemfile in rbs-0.16.0

@@ -13,9 +13,10 @@
 gem "minitest-reporters"
 gem "json"
 gem "json-schema"
 gem 'stackprof'
 gem "goodcheck"
+gem "dbm"
 
 # Test gems
 gem "rbs-amber", path: "test/assets/test-gem"
 
 group :ide, optional: true do