Bump version number, and ensure DB upgrade captures both 4.4.0 and 4.5.0 versions.

db/upgrade.php

@@ -934,7 +934,7 @@ function xmldb_qtype_stack_upgrade($oldversion) {
         upgrade_plugin_savepoint(true, 2023092400, 'qtype', 'stack');
     }
 
-    if ($oldversion < 2023093000) {
+    if ($oldversion < 2023111600) {
         $table = new xmldb_table('qtype_stack_options');
         $field = new xmldb_field('decimals', XMLDB_TYPE_CHAR, '8', null, XMLDB_NOTNULL, null, '.');
 
@@ -944,7 +944,7 @@ function xmldb_qtype_stack_upgrade($oldversion) {
         }
 
         // STACK savepoint reached.
-        upgrade_plugin_savepoint(true, 2023093000, 'qtype', 'stack');
+        upgrade_plugin_savepoint(true, 2023111600, 'qtype', 'stack');
     }
 
     // Add new upgrade blocks just above here.

stack/maxima/stackmaxima.mac

@@ -3316,4 +3316,4 @@ is_lang(code):=ev(is(%_STACK_LANG=code),simp=true)$
 
 /* Stack expects some output with the version number the output happens at */
 /* maximalocal.mac after additional library loading */
-stackmaximaversion:2023102701$
+stackmaximaversion:2023111600$

version.php

@@ -24,12 +24,12 @@
 
 defined('MOODLE_INTERNAL') || die();
 
-$plugin->version   = 2023102701;
+$plugin->version   = 2023111600;
 $plugin->requires  = 2020061500;
 $plugin->cron      = 0;
 $plugin->component = 'qtype_stack';
 $plugin->maturity  = MATURITY_ALPHA;
-$plugin->release   = '4.5.0 for Moodle 3.9+';
+$plugin->release   = '4.6.0 for Moodle 3.9+';
 
 $plugin->dependencies = array(
     'qbehaviour_adaptivemultipart'     => 2020103000,