Change the callback functions that receive a ble_gap_conn_desc pointer to instead receive a NimBLEConnInfo reference.
* Add a reason parameter to the server disconnect callback.
* Remove connect and disconnect callback that do not receive info parameters.
* Remove onRead and onWrite Characteristic callbacks that do not receive info parameters.
* Add info parameter to Descriptor onWrite and onRead callbacks.
* Add details to migration guide.
Changes all functions that accept a time parameter to use milliseconds instead of seconds.
* Adds duration input to NimBLEDevice::startAdvertising and NimBLEServer::startAdvertising.
Adds support for advertising and connections with coded/2M PHY's.
Adds new classes `NimBLEExtAdvertising` and `NimBLEExtAdvertisement`.
When extended advertising is enabled the original advertising classes become unavailable and the new classes must be used.
Changed some return values for advertising methods for consistency with the new classes methods.
