Add lodash deburr to autocomplete so that is works with diacritics

[brentswisher]

Description

Added lodash's deburr function to the autocomplete so that when searching in a language that has diacritics it will find them both with and without the diacrytic. For example now both "/U" and "/Ü" will find the "Überschrift" block in the German language.

How has this been tested?

Type /U and /Ü and verify that they both return the expected result block in the German Language. FIxes #10489

Screenshots

Types of changes

Bug fix (non-breaking change which fixes an issue)

Checklist:

• My code is tested.
• My code follows the WordPress code style.
• My code follows the accessibility standards.
• My code has proper inline documentation.

[brentswisher]

Updated to also deburr the keywords when comparing them, closes #10771 which was really the same issue all along. Thanks to @Soean for pointing it out.

[chrisvanpatten]

Do we have any e2e tests that could cover this change, either in this PR or a follow-up PR?

[brentswisher]

I'm pretty new to working on Gutenberg so I'm not too familiar with the e2e tests, but I will try to look into it and add one this week if I can.

[youknowriad]

This could also be just a unit test, I think.

[brentswisher]

Hmm, so I had hoped there would be some existing unit tests for the autocomplete component that I could work off of, but I'm not seeing any. I spent some time on this, but I'm afraid that creating these tests might be a bit beyond me at this point.

I could get the autocomplete component loaded in with a completer and verify the options were set in the AutoCompleter component, but I couldn't figure out interacting with it to generate a list of the options bosed on input, unless someone could point me in the right direction?

[youknowriad]

@brentswisher It's fine we can get it in without tests or someone else could chime in.

[youknowriad]

Too bad it works only for latin languages though.

I can't search for صُورَ to get the image block for instance in arabic.