App Crash on wrong name strings

## 🐛 Bug Report

App crash if the name string isnt found in the eva icon library.

## To Reproduce

Steps to reproduce the behavior:
Adding a wrong string for the icon name.

## Expected behavior
Instead of throwing a violation there should be a testing mechanism which prevents of throwing a violation and return null instead of the icon with a wrong name string to prevent app crashes.

## Link to runnable example or repository (highly encouraged)

## React Native Eva Icons Version
newest

## Environment information
IOS 13.3 / 13.4
Android 8/9

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