unit tests phpstan and magento coding standards

Model/Carrier/AdditionalInfo.php

Model/Carrier/BobGo.php

Plugin/Checkout/Block/LayoutProcessorPlugin.php

Test/Unit/Block/System/Config/Form/Field/VersionTest.php

Test/Unit/Helper/DataTest.php

Test/Unit/Model/Carrier/AdditionalInfoTest.php

Test/Unit/Model/Carrier/BobGoTest.php

Test/Unit/Model/Carrier/USubsTest.php

Test/Unit/Model/Source/FreemethodTest.php

Test/Unit/Model/Source/GenericTest.php

Test/Unit/Observer/ConfigChangeObserverTest.php

Test/Unit/Plugin/AddWeightUnitToOrderPluginTest.php

...t/Plugin/Block/DataProviders/Tracking/ChangeTitleTest.php

Test/Unit/Plugin/Block/Tracking/PopUpDeliveryDateTest.php

.../Unit/Plugin/Checkout/Block/LayoutProcessorPluginTest.php