CsvReader::current() does not check for end of line. #130

CsvReader::current() does not check for end of line.
So if we have the end of the file $line = $this->file->current(); returns us false.
Then php die when try to count for false if (count($this->columnHeaders) === count($line)) {

It as well can happen here:

        if (empty($this->columnHeaders)) {
            return $this->file->current();
        }

So that means
public function current(): ?array has a wrong return type (according to code, it has to be false|null|array)

I am currently use composer patch which is adding a simple check.

         do {
             $line = $this->file->current();
 
+			if ($line === false) {
+				return false;
+			}
+
             // In non-strict mode pad/slice the line to match the column headers
             if (!$this->isStrict()) {
                 if ($this->headersCount > count($line)) {