Add 1.13.1 version definition

Author: cedric-anne

plugin.xml

@@ -193,6 +193,11 @@ Il existe un [script de migration](https://github.com/pluginsGLPI/customfields/b
          <compatibility>~10.0.0</compatibility>
          <download_url>https://github.com/pluginsGLPI/fields/releases/download/1.14.0/glpi-fields-1.14.0.tar.bz2</download_url>
       </version>
+      <version>
+         <num>1.13.1</num>
+         <compatibility>~9.5.0</compatibility>
+         <download_url>https://github.com/pluginsGLPI/fields/releases/download/1.13.1/glpi-fields-1.13.1.tar.bz2</download_url>
+      </version>
       <version>
          <num>1.13.0</num>
          <compatibility>~9.5.0</compatibility>