Update Jest to 27.x version
One of my recent tickets on Angular project I work was to update unit test framework jest to 27.x version. If there was a simple, painless process this article wouldn’t existed. During update process I encountered all possible errors (I think). Searching for a solution on the internet didn’t helped much. So I decided to make this article so that people who try to update jest to 27.x version didn’t encounter this much errors.
