accept multiple nuspec files in fix-nuspec, fixes https://github.com/fsprojects/Paket/issues/2253
accept multiple nuspec files in fix-nuspec, fixes https://github.com/fsprojects/Paket/issues/2253

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