* Bump pyca/cryptography dependency upper bound to version 47
* Timestamps are now verified with the timestamp time as reference time
like the RFC says: this means that the certificate chain no longer needs
to be valid at current time, it is enough for it to have been valid at
timestamp time
OBS-URL: https://build.opensuse.org/package/show/devel:languages:python/python-rfc3161-client?expand=0&rev=7
