v520.0.0

Release to target compatibility with Blender 5.2, and a change in the version number to reflect this (520 -> 5.2, 530 -> 5.3).

What's Changed

• Add 'AccumulateField' methods for sockets by @BradyAJohnston in #96
• Update for Blender 5.2 by @BradyAJohnston in #92
• add Using to documentation by @BradyAJohnston in #98

Full Changelog: v0.18.0...v520.0.0