v0.8.1

Changed

• Some internal code formatting and changed a missing return type for a function inside the dependency container

Fixed

• Fixed an issue where creating a new class from the main DI container would return null because, the function that
  resolved class dependencies won't resolve a new one if the class already exists within the main container array.
  This is a problem when you call Polyel::new(...) and want a new class instance which doesn't get stored in the
  main container. Usually this is not a problem, but it fails to create a new class if it already exists. The solution
  was to allow new classes to be created no matter what if the parameter $returnClassOnly is set to true.