[tepl] Copy news from version 4.2.1

[Sébastien Wilmet <swilmet src gnome org>]

commit 746a7c1c6901e10bb05dc7ed9f96fab17721318e
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Thu Nov 21 10:11:53 2019 +0100

    Copy news from version 4.2.1

 NEWS | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
---
diff --git a/NEWS b/NEWS
index 201d7c1..41b85f1 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,19 @@
+News in 4.2.1, 2019-11-21
+-------------------------
+
+Changes for packagers:
+* Documentation: GTK+ -> GTK. Please update the description of the package.
+
+Other changes:
+* Fix a few compilation warnings.
+* Better use of errno (save its value ASAP, then reset it to 0).
+* Build from Git:
+ - Allow building with gettext ≥ 0.20.
+ - Adapt for AX_CODE_COVERAGE API break in autoconf-archive version 2019.01.06.
+ (this didn't affect the build from the previous tarball, since the Autotools
+ are "bundled" with the tarball).
+* Translation updates.
+
 News in 4.2.0, 2018-07-16
 -------------------------
 * Nothing new.