[FIX] Fix auto complete regex expression

[dnlsilva]

Proposed changes

Issue(s)

Add Cyrillic alphabet to auto complete regex expression

How to test or reproduce

Mention a user in a chat using the Cyrillic alphabet, autocomplete should erase the characters used to find the user and keep only the name.

Screenshots

Without the fix:

Screen.Recording.2022-02-24.at.17.51.54.mov

With the fix:

Screen.Recording.2022-02-24.at.17.52.52.mov

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• Improvement (non-breaking change which improves a current function)
• New feature (non-breaking change which adds functionality)
• Documentation update (if none of the other choices apply)

Checklist

• I have read the CONTRIBUTING doc
• I have signed the CLA
• Lint and unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works (if applicable)
• I have added necessary documentation (if applicable)
• Any dependent changes have been merged and published in downstream modules

Further comments

[dnlsilva]

Regex tests:

https://www.typescriptlang.org/play?#code/MYewdgzgLgBAthA5jAvDA5AAUFwggGEEAIgAHAJwBMAzAIyUBslxJc6AUKJLCADYAmqMA9AAoA2gEMAtAC8ADOOIA6APoBdANQBKACT8A3K3DQYAJwCmiEwA8+QsVNkLF4gO65xgeRA1W3fvbGzl0mtBAH4AQgA9dWFw5X5EPR8ILhN5ThBEQQREeVMAB05RYBNBLm4AGgx0dXUBfgAiHAI6mETk1PTMpByTfMLi03MLCvQqmv56zGbWzhS0jKzu3qLBAYDh0dqGuuYgA

[try-catch-stack]

I also made a PR #3696 but as @diegolmello pointed , it was not working on iOS . So I have updated the regex in the PR .Can you please take a look at it?

Check Regex test .

[dnlsilva]

I also made a PR #3696 but as @diegolmello pointed , it was not working on iOS . So I have updated the regex in the PR .Can you please take a look at it?

Check Regex test .

Yes, he is correct, it is the same as this commit I had made here: e2b11e3
I was testing other things yesterday, but it didn't work out very well :).