Added Vue language support

Belongs to: https://gerrit-review.googlesource.com/c/gerrit/+/438424.

Release-Notes: Added Vue language support.
Change-Id: I0721c5a1cf8926ef37421bcc2e9c064fdf6895b4

web/element/language.ts

diff --git a/web/element/language.ts b/web/element/language.ts
index c0dd176..ef882cf 100644
--- a/web/element/language.ts
+++ b/web/element/language.ts
@@ -118,6 +118,7 @@
 import {rust} from '@codemirror/lang-rust';
 import {sass} from '@codemirror/lang-sass';
 import {sql} from '@codemirror/lang-sql';
+import {vue} from '@codemirror/lang-vue';
 import {xml} from '@codemirror/lang-xml';
 import {yaml} from '@codemirror/lang-yaml';
 
@@ -356,6 +357,8 @@
       return StreamLanguage.define(vhdl);
     case 'text/velocity':
       return StreamLanguage.define(velocity);
+    case 'text/vue':
+      return vue();
     case 'text/x-webidl':
       return StreamLanguage.define(webIDL);
     case 'application/xquery':