Fix package-all.cmd

[congyiwu]

1. Remove dotnet restore It's unnecessary as of .NET Core 2.0: https://docs.microsoft.com/en-us/dotnet/core/tools/dotnet-restore

2. Add --runtime win10-x64 to dotnet test to fix this error:

   NETSDK1031: It is not supported to build or publish a self-contained application without specifying a RuntimeIdentifier. Please either specify a RuntimeIdentifier or set SelfContained to false.

3. Fix if not errorlevel 0 if not errorlevel 0 is true if ERRORLEVEL is negative, which was probably unintentional. From https://ss64.com/nt/errorlevel.html:

   IF ERRORLEVEL n statements should be read as IF Errorlevel >= number