decodeToString method, for simple decoding

[beregovoy]

My case of using your lib is usually encode/decode simple integer ID. So after every decode i have to get first value of this array. I never used array of decoded variables so need at simple method which will just return me string of imploded values of decode.

I used my own class, which extends lib, on my projects, but want to offer you little function to add this functional )

I added simple method like helper.

public function decodeToString(string $hash): string
{
    return implode($this->decode($hash));
}

Tests was extended also :)

[vinkla]

Thanks for the suggestion. This is something I won't add to the package. I leave it up to users to implement this functionality instead.