Kotlin: add typealias keyword

Author: ilaborie

components/prism-kotlin.js

@@ -2,7 +2,7 @@
 	Prism.languages.kotlin = Prism.languages.extend('clike', {
 		'keyword': {
 			// The lookbehind prevents wrong highlighting of e.g. kotlin.properties.get
-			pattern: /(^|[^.])\b(?:abstract|annotation|as|break|by|catch|class|companion|const|constructor|continue|crossinline|data|do|else|enum|final|finally|for|fun|get|if|import|in|init|inline|inner|interface|internal|is|lateinit|noinline|null|object|open|out|override|package|private|protected|public|reified|return|sealed|set|super|tailrec|this|throw|to|try|val|var|when|where|while)\b/,
+			pattern: /(^|[^.])\b(?:abstract|annotation|as|break|by|catch|class|companion|const|constructor|continue|crossinline|data|do|else|enum|final|finally|for|fun|get|if|import|in|init|inline|inner|interface|internal|is|lateinit|noinline|null|object|open|out|override|package|private|protected|public|reified|return|sealed|set|super|tailrec|this|throw|to|try|typealias|val|var|when|where|while)\b/,
 			lookbehind: true
 		},
 		'function': [
@@ -59,4 +59,4 @@
 		interpolation: interpolation
 	};
 
-}(Prism));
+}(Prism));