Marked version: 14.1.3

Describe the bug
Cannot use \ to escape ~

To Reproduce
Steps to reproduce the behavior:

*a\* ~b\~

https://marked.js.org/demo/?outputType=html&text=*a%5C*%20~b%5C~&options=%7B%0A%20%22async%22%3A%20false%2C%0A%20%22breaks%22%3A%20false%2C%0A%20%22extensions%22%3A%20null%2C%0A%20%22gfm%22%3A%20true%2C%0A%20%22hooks%22%3A%20null%2C%0A%20%22pedantic%22%3A%20false%2C%0A%20%22silent%22%3A%20false%2C%0A%20%22tokenizer%22%3A%20null%2C%0A%20%22walkTokens%22%3A%20null%0A%7D&version=14.1.3

Expected behavior
This should result in *a* ~b~ being rendered as text instead of markup

Instead we get:

<p>*a* <del>b\</del></p>

Works for the * and also seems to work if the opening ~ is escaped instead of the closing one