Certpeek

* Fix deprecation warnings on newer cryptography versions (>=42)
* Advertise support for Python 3.12
* Update list of known CT logs

* Print the name of the curve, instead of the key size, for ECC certificates

* Print not before/not after with timezone info and in the local timezone

* Added support for Python 3.11
* Removed support for Python 3.7
* Updated list of CT logs

* Fixed regression: certificate was validated against the specified host, even though `--servername` was specified.

* Added support for IPv6 addresses
* Added support for urls, in addition to plain hostnames
* Dropped Python 3.6 support
* Updated list of CT logs