Fix appveyor config

Author: abeham

appveyor.yml

@@ -7,7 +7,8 @@ build_script:
     dotnet restore
 
     dotnet build --configuration Release
-    dotnet pack --no-build --configuration Release
+
+    dotnet pack SimSharp --no-build --configuration Release
     
     popd
 

src/SimSharp/SimSharp.csproj

@@ -89,7 +89,7 @@ Sim# allows modeling processes easily and with little boiler plate code. A proce
   </Target>
 
   <ItemGroup>
-    <None Include="$(SolutionDir)..\LICENSE.txt" Pack="true" PackagePath="" />
+    <None Include="..\..\LICENSE.txt" Pack="true" PackagePath="" />
   </ItemGroup>
 
   <ItemGroup>