Allow raw response text to be read from event listeners

 response.text() cannot be called twice without cloning first. Since we're calling it without cloning the response,
 we are making the raw text inaccessible to event listeners that want to access the response data, so let's cache the text we've read.

src/index.js

@@ -283,7 +283,7 @@ async function send(control, action = '', method = 'GET', body = null, enctype =
       let text = await response.text()
       let wrapper = document.createRange().createContextualFragment('<template>' + text + '</template>')
       response.html = wrapper.firstElementChild.content
-
+      response.raw = text
       return response
     })