… Pi 5 (#274)

* move to gpiozero

* fix: use same relay object

* fix: inverted state

* fix(driver): add class method for get_or_create_Relay

* fix(driver): fix xor

* fix(__init__): remove useless space

* fix(driver): remove to_return + add explicit pin_factory + fix xor

* feat: drop support to py<=3.8

* fix(test): fix test_driver

* fix(test_driver): revert test data + fix test + add get_or_create test

* fix(test): remove test_driver_get_or_create

* fix(test): fix init tests

* fix(driver): add typing to relays list + fix mypy config

* fix(test): remove unused import

* fix(driver+test): remove Trailing whitespaces

* fix(driver): remove explicit PinFactory (to be tested)

* fix(setup): add RPi.GPIO

* Drop Python 3.7 (EOL).

* Type constraints for the list of Tasks.

* Revert "Type constraints for the list of Tasks."

This reverts commit 946f697.

* Removing typing-extensions.

* Restore standalone xor in driver.

* Ref: Simpler truthy condition in Relay::toggle().

* Simpler conditional invocation of on/off in Relay::toggle().

* Reusing xor() in the condition of Relay::get_or_create_relay().

* Renaming Relay::relays to cache.

* Renaming Relay::get_or_create_relay() to ensure().

* Renaming class Relay to Driver.

* Renaming Driver::relay to handle.

* Fix test suite name.

* Renaming to DriverMock in main test.