application to text mime group for javascript

Ref:
https://html.spec.whatwg.org/multipage/scripting.html#scriptingLanguages

mime.types

@@ -12,9 +12,9 @@ types {
 
   # JavaScript
 
-    # Normalize to standard type.
+    # Servers should use text/javascript for JavaScript resources.
-    # https://tools.ietf.org/html/rfc4329#section-7.2
+    # https://html.spec.whatwg.org/multipage/scripting.html#scriptingLanguages
-    application/javascript                js;
+    text/javascript                       js;
 
 
   # Manifest files