Add more soft keywords

Author: julienrf

components/prism-scala.js

@@ -8,7 +8,7 @@ Prism.languages.scala = Prism.languages.extend('java', {
 		pattern: /("|')(?:\\.|(?!\1)[^\\\r\n])*\1/,
 		greedy: true
 	},
-	'keyword': /<-|=>|\b(?:abstract|case|catch|class|def|do|else|extends|final|finally|for|forSome|given|if|implicit|import|lazy|match|new|null|object|override|package|private|protected|return|sealed|self|super|this|throw|trait|transparent|try|type|using|val|var|while|with|yield)\b/,
+	'keyword': /<-|=>|\b(?:abstract|case|catch|class|def|derives|do|else|enum|extends|extension|final|finally|for|forSome|given|if|implicit|import|infix|inline|lazy|match|new|null|object|opaque|open|override|package|private|protected|return|sealed|self|super|this|throw|trait|transparent|try|type|using|val|var|while|with|yield)\b/,
 	'number': /\b0x(?:[\da-f]*\.)?[\da-f]+|(?:\b\d+(?:\.\d*)?|\B\.\d+)(?:e\d+)?[dfl]?/i,
 	'builtin': /\b(?:Any|AnyRef|AnyVal|Boolean|Byte|Char|Double|Float|Int|Long|Nothing|Short|String|Unit)\b/,
 	'symbol': /'[^\d\s\\]\w*/