opensc security, bug fix, and enhancement update

0.20.0-4 - Use file cache by default 1892810 - Avoid calloc with 0 argument 1895401 0.20.0-3 - Support PIN change for HID Alt tokens 1830901 - Fix CVE-2020-26570, CVE-2020-26571 and CVE-2020-26572 - Fix right padding of token labels of some cards 1877973...