MINOR Don't add PHP constructs (e.g. integer) to the use statement

[maxime-rainville]

Fixing #150

This is not valid php.

<?php
use integer;
use string;

function intToString(integer $val): string
{
    return (string)$val;
}

This PR simply adds PHP types to the list of words that should be ignored when adding use statements.

[bergice]

Some of these variables do not need to be numbered.

[maxime-rainville]

Fixed.