fix(javascript) final solid fix for runaway regex

Author: joshgoebel

src/languages/javascript.js

@@ -256,9 +256,7 @@ export default function(hljs) {
           regex.lookahead(regex.concat(
             // we also need to allow for multiple possible comments inbetween
             // the first key:value pairing
-            /(\/\/.*$)*/,
-            /(\/\*(.|\n)*\*\/)*/,
-            /\s*/,
+            /(((\/\/.*$)|(\/\*(\*[^/]|[^*])*\*\/))\s*)*/,
             IDENT_RE + '\\s*:'))),
         relevance: 0,
         contains: [