News in 5.4.0, 2022-03-18
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 * Build system fixes for Windows and macOS
 * Style updates for Adwaita, Adwaita-dark, solarized-light, solarized-dark,
   Classic, and a new Cobalt-light variant
 * Language improvements for C, C++, GTK-DOC, and JSON
 * Various header fixes
 * Additional API to append/prepend search paths for language manager
 * Allow loading language specifications via GResources
 * A new "weight" attribute for style schemes which allows more control
   than just bold="true"
 * Various Vim emulation fixes
 * GtkSourceView now requires GTK 4.6 for various CSS improvements
 * Additional performance fixes to reduce overdraws by GPU
 * Translation updates