v1.9.0

Upgrade Process Flow to use JointJS version 4.1.3

Enhance Stretched Chord to

• Control colour of nodes in node elements
• Set colour of link from colour of LHS node if colour not defined in relationship
• Only highlight links directly connected to node hovered over

What's Changed

• Update jointjs by @duncanolesen in #115
• Stretched chord enhancements by @duncanolesen in #116

Full Changelog: v1.8.2...v1.9.0