Dependency deprecation warning for baseUrl

[timharek]

When using render() with baseUrl prop I get the following warning:

marked(): baseUrl parameter is deprecated since version 5.0.0, should not be used and will be removed in the future. Instead use https://www.npmjs.com/package/marked-base-url.

I guess this is fixable in the same way as #70.

[deer]

@hashrock / @timharek, this can be closed. It was solved by Marvin in #81. He writes:

This will resolve the annoying baseUrl is deprecated warning we're seeing in some projects.

[hashrock]

Thank you!