### Description At this time there seems to be an issue with the demo. Running `yarn start` or visiting the [demo page](https://mdefy.github.io/markdown-editor-core/) does not load the editor and reveals an error. Error: > Invalid regular expression: invalid group specifier name Could be a Safari specific issue. [[example](https://stackoverflow.com/questions/51568821/works-in-chrome-but-breaks-in-safari-invalid-regular-expression-invalid-group)]  Demo is broken as well: <img width="902" alt="image" src="https://user-images.githubusercontent.com/14940633/221348271-47692727-bfb1-43bf-9d7b-fff5e782e77d.png">
Description
At this time there seems to be an issue with the demo. Running
yarn startor visiting the demo page does not load the editor and reveals an error.Error:
Could be a Safari specific issue. [example]
Demo is broken as well: