[tepl] NEWS file: start to write news for next version

[Sébastien Wilmet <swilmet src gnome org>]

commit a0188eef1530a101a84b1de125cb5114034725b7
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Mon Apr 13 14:02:15 2020 +0200

    NEWS file: start to write news for next version

 NEWS | 9 +++++++++
 1 file changed, 9 insertions(+)
---
diff --git a/NEWS b/NEWS
index 21bcebd..61c1dc0 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,12 @@
+News in x.y.z, 2020-xx-yy (not yet released)
+-------------------------
+* Build system: port to Meson, remove Autotools.
+* Add TeplMetadataStore class, it will replace the metadata manager.
+* Utils functions: add more functions.
+* TeplInfoBar: add tepl_info_bar_set_buttons_orientation().
+* File loading and saving: add some IO error info bars.
+* Translation updates.
+
 News in 4.4.0, 2020-03-05
 -------------------------
 * Translation updates.