Strings are parsed in heredoc blocks.

[Anaphase]

Consider the following SIML:

```
"this" should be plain text and so should 'this'
`this` works as expected though!
```

which compiles to:

%%__STRING_TOKEN___%%0 should be plain text and so should %%__STRING_TOKEN___%%1
`this` works as expected though!

Strings should not be parsed inside triple backticks, right?

[padolsey]

Thanks for reporting this! Fixed and bumped to version 0.3.5.