news: update

[Akim Demaille]

commit 526ef45f306ed85ae22411e2564a66e5e39c9778
Author: Akim Demaille <akim.demaille@gmail.com>
Date:   Fri Jul 3 06:52:29 2020 +0200

    news: update

diff --git a/NEWS b/NEWS
index 094500b7..2defab4a 100644
--- a/NEWS
+++ b/NEWS
@@ -2,6 +2,16 @@ GNU Bison NEWS
 
 * Noteworthy changes in release ?.? (????-??-??) [?]
 
+** Deprecated features
+
+  The YYPRINT macro, which works only with yacc.c and only for tokens, was
+  obsoleted long ago by %printer, introduced in Bison 1.50 (November 2002).
+  It is deprecated and its support will be removed eventually.
+
+  In conformance with the recommendations of the Graphviz team, in the next
+  version Bison the option `--graph` will generate a *.gv file by default,
+  instead of *.dot.  A transition started in Bison 3.4.
+
 ** New features
 
 *** Counterexample Generation