gemspec.yml in drain-0.5.1 vs gemspec.yml in drain-0.6.0

@@ -7,8 +7,8 @@
 email: [e-mail]
 homepage: https://github.com/DamienRobert/drain#readme
 
 development_dependencies:
   minitest: "~> 5.0"
-  rake: "~> 10"
-  rubygems-tasks: "~> 0.2"
-  yard: "~> 0.8"
+  rake: ">= 10"
+  chronic: "~> 0.10"
+  chronic_duration: "~> 0.10"