[gjs] release: Prepare for 1.55.3

[Philip Chimento <pchimento src gnome org>]

commit 26fff35ff57b5ddb6375c24371fa3757391d5c14
Author: Philip Chimento <philip chimento gmail com>
Date:   Sun Dec 9 21:55:40 2018 -0800

    release: Prepare for 1.55.3

 NEWS | 9 +++++++++
 1 file changed, 9 insertions(+)
---
diff --git a/NEWS b/NEWS
index 3c65ac62..5c80f3f6 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,12 @@
+Version 1.55.3
+--------------
+
+- Closed bugs and merge requests:
+  * Manually constructed ByteArray toString segfaults [#219, !254, Philip
+    Chimento]
+  * signals: Add _signalHandlerIsConnected method [!255, Jason Hicks]
+  * Various maintenance [!257, Philip Chimento]
+
 Version 1.52.5
 --------------