Nimble install somepackage does not download nim files in some cases
trying to install a package with `nimble install packagename` (with nim 1.2 and nimble 0.11) in some cases the .nim file are not installed. Tested this both on windows and linux. Currently I know of two packages that suffer from this:

* https://github.com/Araq/packedjson/issues/7
* https://github.com/pietroppeter/nimoji/issues/1

Apparently a [workaround](https://irclogs.nim-lang.org/21-04-2020.html#09:43:31) is to git clone and then nimble install.

The error when trying to use the package will be of the from:

```import packagename<- error cannot open file packagename```