0.13.1

Changed

• Configuration class variables don't lazy load (#477)
• Default tracer host localhost --> 127.0.0.1 (#466, #480) (@NobodysNightmare)

Fixed

• Workers not shutting down quickly in some short running processes (#475)
• Missing documentation for mysql2 and Rails (#476, #488)
• Missing variable in rescue block (#481) (@kitop)
• Unclosed spans in ActiveSupport::Notifications with multithreading (#431, #478) (@senny)

Read the full changeset and the release milestone.