0.13.0

Backwards Incompatible Changes

• Directives have been changed from functors back to procs. For most projects,
  this should be a transparent change. However, if you were depending on directives
  being objects you will need to update your code to use the procs instead.

Bug Fixes

• Resolved error when detaching a component not present in the archetype
• Fixed issue with optionally detaching accessories

New Features

• Added support for union types in event declarations
• Allow Attach and Swap to operate on objects that don't support copies (Nim >= 2.3)