Update WHATSNEW for 04.02.03 release.

docs/WHATSNEW

@@ -1,6 +1,6 @@
 CHANGES TO REMIND
 
-* VERSION 4.2 Patch 3 - 2023-??-??
+* VERSION 4.2 Patch 3 - 2023-02-10
 
 - NEW FEATURE: Remind: add the orthodoxeaster() function to return the
   date of Orthodox Easter.
@@ -9,6 +9,9 @@ CHANGES TO REMIND
 
 - IMPROVEMENT: Add Greek holiday file courtesy of JeiEl.
 
+- IMPROVEMENT: Fix the Perl code (rem2pdf, rem2html) to silence Perl::Critic
+  warnings
+
 - IMPROVEMENT: Many internal code tweaks to eliminate many cppcheck
   static analysis warnings.
 
@@ -23,6 +26,9 @@ CHANGES TO REMIND
 
 - BUG FIX: Remind: Add missing #include <fcntl.h> to funcs.c
 
+- BUG FIX: Remind: Fix undefined integer-overflow behavior in built-in abs()
+  function.  Pointed out on IRC by "ubitux".
+
 * VERSION 4.2 Patch 2 - 2023-01-01
 
 - NEW FEATURE: Remind: Add the NOQUEUE modifier to the REM statement for