Inconsistent Versions?

[reisner]

When I install wordcloud2 using CRAN I get version 0.2.1:

> install.packages("wordcloud2")
> library(wordcloud2)
> sessionInfo()
...
other attached packages:
[1] wordcloud2_0.2.1

However, when I try to install the latest version from github, I get version 0.2.0:

> library(devtools)
> install_github("Lchiffon/wordcloud2")
> library(wordcloud2)
> sessionInfo()
...
other attached packages:
[1] wordcloud2_0.2.0

Why do I get a lower version number when installing via github?