[moserial] version bump to 3.0.21

[Michael J. Chudobiak <mjc src gnome org>]

commit c46c9c75d04540011dad407163184ceeb4518bf8
Author: Michael J. Chudobiak <mjc avtechpulse com>
Date:   Fri Nov 26 14:29:04 2021 -0500

    version bump to 3.0.21

 NEWS                         | 12 ++++++++++++
 configure.ac                 |  2 +-
 data/moserial.appdata.xml.in |  8 ++++++++
 3 files changed, 21 insertions(+), 1 deletion(-)
---
diff --git a/NEWS b/NEWS
index 9080fd0..972a6b6 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,15 @@
+Version 3.0.21
+--------------
+
+       * added support for pseudoterminals (e.g. /dev/pts/3, Luca Errani)
+       * added release notes to the AppData file (Jordan Williams)
+       * updated Spanish translation (Daniel Mustieles García)
+       * updated Catalan translation (Jordi Mas)
+       * updated German translation (Philipp Kiemle)
+       * added Dutch translation (Nathan Follens)
+       * updated Danish translation (Ask Hjorth Larsen)
+       * updated Czech translation (Marek Černocký)
+
 Version 3.0.20
 --------------
 
diff --git a/configure.ac b/configure.ac
index ed33583..22ebe50 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,4 +1,4 @@
-AC_INIT([moserial],[3.0.20],[https://gitlab.gnome.org/GNOME/moserial/issues/])
+AC_INIT([moserial],[3.0.21],[https://gitlab.gnome.org/GNOME/moserial/issues/])
 dnl - also update data/moserial.appdata.xml.in
 dnl - also update yaml file in the flathub repo
 
diff --git a/data/moserial.appdata.xml.in b/data/moserial.appdata.xml.in
index a0e6341..ef9d997 100644
--- a/data/moserial.appdata.xml.in
+++ b/data/moserial.appdata.xml.in
@@ -30,6 +30,14 @@
   <translation type="gettext">moserial</translation>
   <content_rating type="oars-1.1" />
   <releases>
+    <release version="3.0.21" date="2021-11-26">
+    <description>
+        <p>
+           Adds pseudo-terminal support and updated translations.
+        </p>
+      </description>
+    </release>
+
     <release version="3.0.20" date="2021-07-28">
     <description>
         <p>