add ctype ext to deps

used in `PHPUnit/Util/Configuration.php:1017`:

            (strlen($path) > 3 && ctype_alpha($path[0]) &&

i.e:
```php
1007     /**
1008      * @param  string  $path
1009      * @param  boolean $useIncludePath
1010      * @return string
1011      * @since  Method available since Release 3.5.0
1012      */
1013     protected function toAbsolutePath($path, $useIncludePath = FALSE)
1014     {
1015         // Check whether the path is already absolute.
1016         if ($path[0] === '/' || $path[0] === '\\' ||
1017             (strlen($path) > 3 && ctype_alpha($path[0]) &&
1018              $path[1] === ':' && ($path[2] === '\\' || $path[2] === '/'))) {
1019             return $path;
1020         }
1021 

```

also, seems pear package.xml lacks some other extensions (mentioned in composer.json): 'reflection', 'spl', should these be added too?