[m-rev.] [www]: for review: announce availability of 20.01 beta releases

[Julien Fischer]

Announce the availability of the 20.01 beta releases.

news/newsdb.inc:
    As above.

diff --git a/news/newsdb.inc b/news/newsdb.inc
index 465d21e..75fd1e1 100644
--- a/news/newsdb.inc
+++ b/news/newsdb.inc
@@ -25,6 +25,12 @@

  $newsdb = array(

+"10th January 2020" => array(
+"20.01 beta release available",
+"Beta versions of the upcoming 20.01 release are available on the
+<a href=\"http://dl.mercurylang.org/index.html\">downloads page</a>.
+"),
+
  "9th January 2018" => array(
  "musl libc support",
  "Mercury now works with systems that use the <a href=\"https://www.musl-libc.org\">musl</a>