remove PHP 8.6 deprecations

.phpcs.xml

@@ -56,6 +56,7 @@
                 <element key="extract" value="null"/>
                 <element key="include" value="require"/>
                 <element key="include_once" value="require"/>
+                <element key="is_double" value="is_float"/>
                 <element key="is_integer" value="is_int"/>
                 <element key="join" value="implode"/>
                 <element key="md5" value="hash_file"/>

app/DB/Mysql.php

@@ -223,7 +223,7 @@ class Mysql {
             foreach ($Parameters as $Parameter) {
                 if (is_int($Parameter)) {
                     $Binders .= "i";
-                } elseif (is_double($Parameter)) {
+                } elseif (is_float($Parameter)) {
                     $Binders .= "d";
                 } else {
                     $Binders .= "s";