v2.13.0

Literate v2.13.0

Diff since v2.12.1

See CHANGELOG.md for notable changes.

Closed issues:

• Replace inline backtick math in notebooks (#116)
• DocumenterFlavor with julia codefences and semi-colons (#166)

Merged pull requests:

• Hide code lines with #hide when executing Markdown (#188) (@devmotion)
• Add regression test for changes of showable (#187) (#189) (@devmotion)
• Replace backtick-math with $x$-math in notebook output. (#190) (@fredrikekre)