🤖 Add Ace editor and highlightjs languages to config.json (#180)
🤖 Add Ace editor and highlightjs languages to config.json (#180)

1. `ace_editor_language`: the language identifier for the Ace editor that is used to edit code on the website
2. `highlightjs_language`: the language identifier for Highlight.js which is used to highlight code on the website
exercism/xracket