Support for adding trailing slash to url's

[mthannir]

We are working on SEO changes for our app and as part of this, we want all the url's to end with a '/'. This library is using a function (clean function in /src/utils.ts file) which removes all the trailing '/' from url's.

Is there a way we can make it configurable? If not, can you please support adding trailing '/' to url's.

Thanks!