Jest leaks memory catastrophically

[0atman]

my memory useage goes from 4GB up to my computer's limit of 16GB and then eats all the swap space (2GB) and then my machine freezes up

More reading:

• https://chanind.github.io/javascript/2019/10/12/jest-tests-memory-leak.html
• kulshekhar/ts-jest#1967

[kr8n3r]

we no longer use Jest