testing/py3-kikit: upgrade to 1.5.1

This updates py3-kikit to 1.5.1 and also one of its dependencies, py3-pcbnewtransition, to 0.4.1.

https://github.com/yaqwsx/pcbnewTransition/releases/tag/v0.4.1

https://github.com/yaqwsx/KiKit/releases/tag/v1.5.1