svg js version 3 compatibility

[bhaumikspanchal]

updated morph function to make path morphing plugin compatible with latest svg.js v3.2.x

[Fuzzyma]

hey! thanks for looking into this.
The changes itself look easy enough. However, I would like to move away from gulp to vite and have proper esm builds.
This takes a bit more work unfortunately. Do you think you have the capacity to look into it? Otherwise I need to do it but it will take a while