chg: d.ts build errors fixed

[Keycher]

typescript updated; api-extractor updated;
Skeleton.ts - should have findBoneIndex and findSlotIndex methods based on interface
SkeletonBinary.ts - duplicated AttachmentType, have import from @pixi-spine/base

[ivanpopelyshev]

just published 3.0.15, please check it

[Keycher]

Thanks, now no errors.
But spine isn't working properly with pixi v6.4.2 (release version). There is smt wrong with loader, he doesn't understand that you are loading spine. I'll look at this.
No problem on pixi v6.3.2
Fixed, it was a problem in my config, pixi v6.4.2 + spine v3.0.15 are working good

[ivanpopelyshev]

You scared me with that 6.4.2 stuff )