preact-parser swallows newlines

[hannobraun]

Hey!

I'm using preact-parser 1.3.7 from NPM, and it seems to swallow newlines.

Test case (I've extracted this from my Deno app, hence the npm: thingy in the import):

import parser from "npm:preact-parser";

const contentHtml = "<p>a\nb</p>";
const contentJsx = parser.parse(contentHtml);

console.log(contentHtml);
console.log("---");
console.log(contentJsx.props.children[0].props.children);

Output:

<p>a
b</p>
---
[ "ab" ]

As you can see, the newline does not show up in the output. I don't know what the correct behavior should be. For my use case, it would be perfectly fine to have a space there instead of a newline. But completely swallowing whitespace seems wrong.

I'm about to submit a pull request with a suggested fix.