add UPGRADING and NEWS items

Author: weltling

NEWS

@@ -23,6 +23,8 @@ PHP                                                                        NEWS
     php.exe). (Michele Locati)
   . Implemented "Convert numeric keys in object/array casts" RFC, fixes
     bugs #53838, #61655, #66173, #70925, #72254, etc. (Andrea)
+  . Raised minimum supported Windows versions to Windows 7/Server 2008 R2.
+    (Anatol)
 
 - Date:
   . Fixed bug #69587 (DateInterval properties and isset). (jhdxr)

UPGRADING

@@ -35,6 +35,7 @@ PHP 7.2 UPGRADE NOTES
     /^(0|(-?[1-9][0-9]*))$/ where PHP_INT_MIN <= n <= PHP_INT_MAX) to integer
     keys. This fixes the behaviour of previous versions, where numeric string
     property names would become inaccessible string keys.
+  . Minimum supported Windows versions are Windows 7/Server 2008 R2.
 
 - Session:
   . Removed register_globals related code and "!" can be used as $_SESSION key name.

UPGRADING.INTERNALS

@@ -23,7 +23,8 @@ PHP 7.1 INTERNALS UPGRADE NOTES
 
   b. Windows build system changes
 
-    *  nice() now have a Windows alternative that is implemented in win32/nice.c, using 
+    .  Minimum supported Windows versions are Windows 7/Server 2008 R2.
+    .  nice() now have a Windows alternative that is implemented in win32/nice.c, using
 	   SetPriorityClass(). See the implementation for more in-depth details. This also 
 	   defines HAVE_NICE.