generateSRIHashesModule function generates invalid strings on windows

[felixcicatt]

Because file paths on windows use the backslash character as a path separator, and the generateSRIHashesModule function concatenates the path of pages directly as a string in the perPageSriHashes part of the file it generates, the end result contains invalid strings, because the backslashes need to be escaped:

This could be fixed by escaping the paths before concatenating them into the end result, with a function like below. I can submit a PR if you like.

/**
 * @param {string} s 
 * @returns {string}
 */
const escapeJsonString = (s) => {
    if(!s) return s
    const json = JSON.stringify(s)
    return json.substring(1, json.length - 1)
}

[castarco]

Hi @felixcicatt , please excuse me for taking so much time before answering.

Is this a big problem? Or could be dealt with by relying on WSL? I'm not quite sure about providing this kind of support for Windows, given that almost no single real website runs on it, except for local development environments (and these can be "patched up" via WSL).