Provide humane error messages for missing fireEvent() params

[dominykas]

What:

Adds specific error message text when element / node / event params are missing for fireEvent()

Why:

In some cases you may be calling fireEvent without giving it an element, e.g.
while it is discouraged, in some cases it is necessary to use querySelector or similar or you might be accessing a results[0] in an empty array returned by queryAllBy*.

When you do that - fireEvent() will throw the good old Cannot convert undefined or null to object, which means you need to go and look for what exactly happened.

Providing a human readable, specific error message makes it easier to debug such failures.

How:

Throw a specific error after testing a condition.

Checklist:

• Documentation added to the
  docs site
• Typescript definitions updated
• Tests
• Ready to be merged
  

[kentcdodds]

Cool. Thank you :)

[kentcdodds]

@all-contributors please add @dominykas for code and tests

[allcontributors]

@kentcdodds

I've put up a pull request to add @dominykas! 🎉

[kentcdodds]

🎉 This PR is included in version 6.3.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀