Issues with passing CRLF to pulldown_cmark

[markbahnman]

There's an issue when developing on windows with code blocks in a markdown file such as

```
fn foo () {
  "bar";
}
```

Windows seems to send \r\n which pulldown_cmark doesn't handle well (github issue) and ends up inserting an error message into the resultant html. I fixed it for myself here
markbahnman@7a762d5 but there might be a better way to handle it.

[grego]

Fixed this inside cmark-syntax: grego/cmark-syntax@6439dd7
Available in blades v0.5
Please let me know if it solves the issue.

[markbahnman]

Yup, that seems to solve it, thanks!