Update module github.com/ProtonMail/gopenpgp/v2 to v2.4.6

See merge request !47

At least not until we can control parallelism a little better.

Only run them in the run_test CI job, but not in the Debian
package builds (integration tests are expensive).

Update module github.com/go-ldap/ldap/v3 to v3.4.2

See merge request !45

Update golang.org/x/net commit hash to 749bd19

See merge request !38

Some keys can have an empty 'email' field, but will contain an email
address in the 'id' field.

This allows quick lookups regardless of the domain (the WKD hash only
represents the local part of the uid).

Add support for OpenPGP keys attached to email resources

See merge request !46

Add an API endpoint to set/unset OpenPGP keys attached to email resources.

This is auxiliary data, so it's best to time out early if the backends
are unreachable and still have time to return the User response.

Support Webauthn

See merge request !42

Add tests for that too.

Add enable/disable OTP tests, and a delete ASP test.

The API change is semantically backwards-incompatible, i.e. it will
default to no change unless you set the new set_foo attributes.

Resolves potential conflict when tests are run in parallel.

The composite types can be serialized to JSON without issues or
needing any additional precautions, and the resulting code is
simpler.

Update golang.org/x/net commit hash to 60bc85c

See merge request !29

Fix some issues reported by lintian

See merge request !36

Update golang.org/x/crypto commit hash to 32db794

See merge request !32

Update module github.com/go-ldap/ldap/v3 to v3.4.1

See merge request !37