Changes since last release (https://github.com/github/linguist/compare/v7.8.0...v7.9.0):

• Remove @kivikakk from CONTRIBUTORS.md (#4798)
• Make shebang detection cheaper (#4806)
• Add CodeQL language (#4805)
• Add .jsonc extension (#4797)
• Add OpenQASM support (#4796)
• Add syntax highlighting for PlantUML (#4740)
• Register .luacheckrc as a Lua filename (#4794)
• Add syntax highlighting to Yarn lockfiles (#4761)
• Add Haxe generated source detection (#4808)
• Use newest .gitattributes SHA from test/attributes branch (#4815)
• Add support for Nessus Attack Scripting Language (#4792)
• fix errors on non-UTF-8 encodings (#4730)
• Update Dart grammar (#4820)
• Detect go files as generated according to official rules (#4821)

... and an update to the latest version of all grammars.