fix: update deprecation warning for waitForElement

[kwboyd]

What:

Same issue as #478 but in the waitForElement deprecation warning. The warning when you use waitForElement currently says to use either find* or wait instead, but wait is deprecated as well.

Why:

Up-to-date deprecation warnings

How:

Updated warning to say waitFor instead of wait

Checklist:

• Documentation added to the
  docs site N/A
• I've prepared a PR for types targeting
  DefinitelyTyped N/A
• Tests
• Ready to be merged

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[codecov]

Codecov Report

Merging #535 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master      #535   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           23        23           
  Lines          429       429           
  Branches       103       103           
=========================================
  Hits           429       429           

Impacted Files	Coverage Δ
src/wait-for-element.js	100.00% <ø> (ø)

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[kentcdodds]

Thank you!

[kentcdodds]

@all-contributors please add @kwboyd for code

[allcontributors]

@kentcdodds

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

[kentcdodds]

🎉 This PR is included in version 7.2.2 🎉

The release is available on:

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

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