* Move static function variables from core to be class member variables,
allowing two Core instances to run at once
* Replace deprecated QLatin1Literal with QLatin1String
* qvariant_cast slot argument to ToxPk, rather than trying to convert variant
to bytes directly which is invalid
* Fix "wait for both to come online" accidentally waiting for Bob twice
* Move all sleeps to QTRY_VERIFY_WITH_TIMEOUT to speed up test
* Update settings* -> settings& based on Core API change
* Update Mock to match API change of IBootstrapListGenerator
* Register metatype of ToxPk, uint32_t, Status::Status
* Correct Alice's spy looking for Bob's pk