Fix exception when paket outdated runs on a repo with a http zip dependency
Fix exception when paket outdated runs on a repo with a http zip dependency

http zip dependencies will be extracted after download. As it stands, Paket
forces the download, see
https://github.com/fsprojects/Paket/blob/master/src/Paket.Core/PackageAnalysis/FindOutdated.fs#L30

Without this fix, Paket fails to overwrite existing extracted files.
Hence, delete the dependency's target folder before attempting the download.

artur-s/Paket,fsprojects/Paket,thinkbeforecoding/Paket,sergey-tihon/Paket,mrinaldi/Paket,artur-s/Paket,isaacabraham/Paket,NatElkins/Paket,baronfel/Paket,NatElkins/Paket,cloudRoutine/Paket,jam40jeff/Paket,isaacabraham/Paket,vbfox/Paket,thinkbeforecoding/Paket,thinkbeforecoding/Paket,theimowski/Paket,cloudRoutine/Paket,thinkbeforecoding/Paket,lexarchik/Paket,vbfox/Paket,lexarchik/Paket,lexarchik/Paket,0x53A/Paket,cloudRoutine/Paket,isaacabraham/Paket,inosik/Paket,NatElkins/Paket,isaacabraham/Paket,inosik/Paket,0x53A/Paket,NatElkins/Paket,sergey-tihon/Paket,vbfox/Paket,jam40jeff/Paket,0x53A/Paket,fsprojects/Paket,mrinaldi/Paket,baronfel/Paket,lexarchik/Paket,theimowski/Paket,mrinaldi/Paket,vbfox/Paket,mrinaldi/Paket,cloudRoutine/Paket,0x53A/Paket