Vim 8.1 release

Update version number and information.  Fix a couple of tests.
diff --git a/runtime/doc/ft_sql.txt b/runtime/doc/ft_sql.txt
index d870168..9819c06 100644
--- a/runtime/doc/ft_sql.txt
+++ b/runtime/doc/ft_sql.txt
@@ -1,4 +1,4 @@
-*ft_sql.txt*	For Vim version 8.0.  Last change: 2013 May 15
+*ft_sql.txt*	For Vim version 8.1.  Last change: 2013 May 15
 
 by David Fishburn