fix: Don't attempt to unquote empty strings

Fixes #655.

chore: Bump version in header

doc: How to set the `menu` front-matter

Fixes #166.

chore: Bump versions

The tomelr tarball from GNU ELPA for v0.2.5 doesn't contain the test
files and results in a clean install.

Ref: https://lists.gnu.org/r/emacs-devel/2022-05/msg00095.html

chore: Bump version

Merge pull request #616 from kaushalmodi/hugo-section-frag

feat!: `EXPORT_HUGO_SECTION_FRAG` replaces `EXPORT_HUGO_SECTION*`

doc: Add CHANGELOG generated using git-cliff

https://github.com/orhun/git-cliff

Fixes #563.

Bump version to v0.8; Update changelog

Bump version to v0.7; Update changelog

Change the TOC class name to ox-hugo-toc