Description:
------------
Noticed this while working on something for PHP_CodeSniffer where I wasn't getting the same results for unit tests on Travis versus my local Windows machine.

It appears that hexidecimal integers using the new PHP 7.4 numeric literal separator are tokenized differently on Linux versus Windows.

They should be tokenized as `T_LNUMBER` and are on Linux. See: https://3v4l.org/vlH5j

However on Windows, I'm seeing them get tokenized as `T_DNUMBER`.







Test script:
---------------
$tokens = token_get_all(
	'<?php
$foo = 0xCAFE_F00D;
$foo = 0x42_72_6F_77_6E;'
);

foreach ($tokens as $token) {
    if (is_array($token)) {
        echo "Line {$token[2]}: ", token_name($token[0]), " ('{$token[1]}')", PHP_EOL;
    }
}

Expected result:
----------------
Line 1: T_OPEN_TAG ('<?php
')
Line 2: T_VARIABLE ('$foo')
Line 2: T_WHITESPACE (' ')
Line 2: T_WHITESPACE (' ')
Line 2: T_LNUMBER ('0xCAFE_F00D')
Line 2: T_WHITESPACE (' ')
Line 3: T_VARIABLE ('$foo')
Line 3: T_WHITESPACE (' ')
Line 3: T_WHITESPACE (' ')
Line 3: T_LNUMBER ('0x42_72_6F_77_6E')

Actual result:
--------------
Line 1: T_OPEN_TAG ('<?php
')
Line 2: T_VARIABLE ('$foo')
Line 2: T_WHITESPACE (' ')
Line 2: T_WHITESPACE (' ')
Line 2: T_DNUMBER ('0xCAFE_F00D')
Line 2: T_WHITESPACE ('
')
Line 3: T_VARIABLE ('$foo')
Line 3: T_WHITESPACE (' ')
Line 3: T_WHITESPACE (' ')
Line 3: T_DNUMBER ('0x42_72_6F_77_6E')