Stackplot yticks

[CommonClimate]

and docstring bug fix. This does not have to be perfect, just good enough

[jordanplanders]

Might be a good idea to separate customization for y axis limits and y axis ticks. One option would be to specify the bounding stye as "tight" (mean +/-n*std) or "auto" (matplotlib fall back). This would put the set_ylim code back where it was previously.

[CommonClimate]

Good idea. I added the following options (and docstring):

yticks_minor : bool
            Whether the y axes should contain minor ticks (use sparingly!). Default: False
        
        xticks_minor : bool 
            Whether the x axis should contain minor ticks. Default: False
        
        ylims : str {'spacious', 'auto'}
            Method for determining the limits of the y axes. 
            Default is 'spacious', which is mean +/- 4 x std
            'auto' activates the Matplotlib default

and the pytests to go with it.