Add missing from keyword to typescript & set ts as alias. (#1042)

Author: sebald

components/prism-typescript.js

@@ -1,3 +1,5 @@
 Prism.languages.typescript = Prism.languages.extend('javascript', {
-	'keyword': /\b(break|case|catch|class|const|continue|debugger|default|delete|do|else|enum|export|extends|false|finally|for|function|get|if|implements|import|in|instanceof|interface|let|new|null|package|private|protected|public|return|set|static|super|switch|this|throw|true|try|typeof|var|void|while|with|yield|module|declare|constructor|string|Function|any|number|boolean|Array|enum)\b/
+	'keyword': /\b(break|case|catch|class|const|continue|debugger|default|delete|do|else|enum|export|extends|false|finally|for|from|function|get|if|implements|import|in|instanceof|interface|let|new|null|package|private|protected|public|return|set|static|super|switch|this|throw|true|try|typeof|var|void|while|with|yield|module|declare|constructor|string|Function|any|number|boolean|Array|enum)\b/
 });
+
+Prism.languages.ts = Prism.languages.typescript;