text: Title: [NEW TRANSFORMER] arcsin transformation for decimal data
  Body: For more info on the transformation:
  
  https://stats.stackexchange.com/questions/251449/how-do-i-find-a-variance-stabilizing-transformation
  
  https://www.stata.com/users/njc/topichlp/transint.hlp
  
  Creating the new class is fairly straighforward.
  
  Use the ReciprocalTransformer() as template. Copy it into a new python script called arcsin.py and edit the fit, transform and inverse transform to return the arcsin with np.arcsin and the inverse of that (which we need to investigate how to get it).
  
  Then, we need to adjust the docstrings with some info about the arcsin transformation, which can be found in the links above.