Update to jest@26 leads to 4 tests failing.

[lukasoppermann]

When updating the dependencies to jest@26 and ts-jest@26 4 tests in the __tests__/events/events.test.ts test file fail.

@kaffarell if you have time to look into this, it would be great. It is weird, but probably has to due with some change from jest.

[kaffarell]

Sorry, I was not able to fix this.
What I have found out:

• That the dataTransferObject now has a type (format) as first parameter
• That we maybe have to add a type to the created customEvent (CustomEvent & {dataTransfer?: any})

But sadly none of these things have solved the issue 😭

[lukasoppermann]

Hey @kaffarell thank you for looking into it! I guess we just have to keep trying to figure it out. Let's skip jest@26 for now and release without it.

[lukasoppermann]

@atodorov do you think we should start a branch with to upgrade ts-jest & jest to @26? It will need quite some fixes though.

[atodorov]

A branch + a draft PR seem like a good first step, IDK what is breaking ATM and how much work that would be to adjust the tests.

[lukasoppermann]

Somehow it is mainly TS errors. Some tested parts return false instead of true now which is weird. Do you want to create a draft PR for this?