Unix timestamp not detected and throw an error

[magicoli]

When passing a unix timestamp, the formatter tries to format it as a string and throw an error:

Uncaught Exception: Failed to parse time string (1671062400) at position 8 (0): Unexpected character in (...)vendor/openpsa/ranger/src/Ranger.php:243

The issue is that prepare_date() first checks if the input is a string (although, technically, an integer is also a string).

I solved it by replacing

        if (is_string($input)) {
            return new Datetime($input);
        }
        if (is_int($input)) {
            $date = new Datetime;
            $date->setTimestamp($input);
            return $date;
        }

with

        if (is_numeric($input)) {
            $date = new Datetime;
            $date->setTimestamp($input);
            return $date;
        }
        if (is_string($input)) {
            return new Datetime($input);
        }

I also replaced is_int() by is_numeric(), which is the recommended way to distinguish a number from a string, is_int() failing in some cases.