Remove `project` dependency

Update version to 0.6.1-git

Update version to 0.6.0

Point project links to Sourcehut

Update copyright

Require Emacs 28+

Fix fontification on Emacs 28

Fix some bugs when fontifying matching lines containing colons

Fix test

Remove unnecessary code in `urgrep--start`

Fix up quoting style in `advice-add`

Update version to 0.5.3-git

Update version to 0.5.2

Update copyright

Use `if-let*` and `when-let*`