Cannot assert self service, bypass proxy, or admin only

**Is your feature request related to a problem? Please describe.**
Setting a source in DSC does not support:

* `--allowselfservice`
* `--bypassproxy`
* `--adminonly`

**Describe the solution you'd like**
To match the functionality offered by Chocolatey, these options should be added.

**Describe alternatives you've considered**
N/A

**Additional context**
N/A
