Update runtime files.
diff --git a/runtime/syntax/javascript.vim b/runtime/syntax/javascript.vim
index 78714d0..5c6439f 100644
--- a/runtime/syntax/javascript.vim
+++ b/runtime/syntax/javascript.vim
@@ -7,7 +7,7 @@
" (ss) repaired several quoting and grouping glitches
" (ss) fixed regex parsing issue with multiple qualifiers [gi]
" (ss) additional factoring of keywords, globals, and members
-" Last Change: 2018 Jul 28
+" Last Change: 2019 Sep 27
" 2013 Jun 12: adjusted javaScriptRegexpString (Kevin Locke)
" 2018 Apr 14: adjusted javaScriptRegexpString (LongJohnCoder)
@@ -48,7 +48,7 @@
syn keyword javaScriptBranch break continue
syn keyword javaScriptOperator new delete instanceof typeof
syn keyword javaScriptType Array Boolean Date Function Number Object String RegExp
-syn keyword javaScriptStatement return with
+syn keyword javaScriptStatement return with await
syn keyword javaScriptBoolean true false
syn keyword javaScriptNull null undefined
syn keyword javaScriptIdentifier arguments this var let
@@ -58,7 +58,7 @@
syn keyword javaScriptGlobal self window top parent
syn keyword javaScriptMember document event location
syn keyword javaScriptDeprecated escape unescape
-syn keyword javaScriptReserved abstract boolean byte char class const debugger double enum export extends final float goto implements import int interface long native package private protected public short static super synchronized throws transient volatile
+syn keyword javaScriptReserved abstract boolean byte char class const debugger double enum export extends final float goto implements import int interface long native package private protected public short static super synchronized throws transient volatile async
syn cluster javaScriptEmbededExpr contains=javaScriptBoolean,javaScriptNull,javaScriptIdentifier,javaScriptStringD,javaScriptStringS,javaScriptStringT