===========================
* `15`: remove ggplot (not maintained anymore) (2019-01-28)
* `13`: add notebook on scikit-plot (2018-10-14)
* `4`: replace basemap by cartopy (2018-07-24)
* `9`: add notebook on pyecharts (2018-07-05)
* `8`: try catch around ggplot (not maintained anymore) (2018-05-24)
* `7`: split unit test on ggplot - failing on appveyor (2018-03-28)
* `6`: fix notebook on pythreejs (update to 1.0.0) (2018-03-22)
* `5`: fix unit test with ete3 (2017-12-20)