docs: pointing to solution for FIXME

discussed in pull request #159

Author: analog-nico

README.md

@@ -430,6 +430,7 @@ var $ = require('cheerio'); // Basically jQuery for node.js
 
 function autoParse(body, response, resolveWithFullResponse) {
     // FIXME: The content type string could contain additional values like the charset.
+    // Consider using the `content-type` library for a robust comparison.
     if (response.headers['content-type'] === 'application/json') {
         return JSON.parse(body);
     } else if (response.headers['content-type'] === 'text/html') {