TestBadCertificate is no longer needed for 1.24+
```
CreateCertificate will now generate a serial number using
a RFC 5280 compliant method when passed a template with a
nil Certificate.SerialNumber field, instead of failing.
```
Update CertificateFromPEM to be a loop over the PEM blocks.
This allows decoding the private key before decoding the certificate.
Tries to parse the certificate block directly but if that errors,
then it also tries to base64 decode the certificate block.
Fixes#3042
The tests are run in a Node.js environment, and this does not include
any browser tests. This requires the wrtc package from npm as well as a
shim which adds portions of the WebRTC API to the global scope.
Some tests introduced here can be combined when differences between the
Go API and the WASM bindings are addressed and as missing features are
added to the WASM bindings.
We can and should add more tests in the future to improve test coverage.
This should be considered the minimum number of tests reuqired to ensure
basic functionality is working.
