Add support for `<span class="tg-spoiler">`

This release adds support for <span class="tg-spoiler"> entities, along with the already supported <tg-spoiler> tags.

Fix entity escaping for link tags in toHTML

1.0.3

Add entity escaping to URLs

Improve markdown parsing

Improve markdown parsing, fixing a small issue.

Fix toHTML

Small fix to toHTML!

First release

First release of the library!