Issue title: How to set axis limit?
 Issue body: Hello,

I want to set the axis limit for the plot of `evo_traj`. I tried to add `ax.set_xlim(right=5)` in [here](https://github.com/MichaelGrupp/evo/blob/051e5bf63195172af58dc8256cc71618f079f224/evo/tools/plot.py#L324), but it didn't work.

Could you please provide a qucik code to set axis limit? Thanks a lot.
 Comments: 
 Comment 0: You might find help here: https://stackoverflow.com/questions/17734587/why-is-set-xlim-not-setting-the-x-limits-in-my-figure


 Comment 1: @MichaelGrupp
Thank you for your advice.
This [answer](https://stackoverflow.com/a/59884328/11157926) solves my problem.
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