Axis colour is not correct

[copark86]

One of the axis colours is attached with the textcolor(not axiscolor). Is it intended?

https://github.com/leonardvandriel/cvplot/blob/e997368c6a3963159b8ae12dfa2c0f3c04d46083/src/cvplot/figure.cc#L650

[leovandriel]

Thank you for reporting this issue. It is fixed in #32