Update DB

Add 'f' type for float fields.

app/Core/DB.php

@@ -151,6 +151,7 @@ class DB extends PDO
                     case 'i':
                     case 'b':
                     case 's':
+                    case 'f':
                         $value = [1];
                         break;
                     default:

app/Core/DBStatement.php

@@ -36,6 +36,7 @@ class DBStatement extends PDOStatement
         's'  => PDO::PARAM_STR,
         'i'  => PDO::PARAM_INT,
         'b'  => PDO::PARAM_BOOL,
+        'f'  => PDO::PARAM_STR,
         'a'  => PDO::PARAM_STR,
         'as' => PDO::PARAM_STR,
         'ai' => PDO::PARAM_INT,