CI: restore DevExtreme.AspNet.Core from local folder, even if the version is not stable (#3124)

Author: alexslavr

NetCoreDemos/DevExtreme.NETCore.Demos.csproj

@@ -22,7 +22,7 @@
     <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="6.0.12" />
     <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="6.0.12" />
     <PackageReference Include="DevExtreme.AspNet.Data" Version="3.0.0" />
-    <PackageReference Include="DevExtreme.AspNet.Core" Version="23.2.0" />
+    <PackageReference Include="DevExtreme.AspNet.Core" Version="23.2.*-*" />
     <PackageReference Include="Microsoft.AspNetCore.Mvc.NewtonsoftJson" Version="6.0.12" />
     <PackageReference Include="Microsoft.AspNetCore.SignalR.Protocols.NewtonsoftJson" Version="6.0.12" />
     <PackageReference Include="Microsoft.Data.SqlClient" Version="2.1.7" />

gulpfile.js/copy-asp-files.js

@@ -30,12 +30,7 @@ function runBuild(callback) {
 }
 
 function restorePackages(callback) {
-  systemSync('dotnet restore NetCoreDemos');
-  callback();
-}
-
-function installAspNetCorePackage(callback) {
-  systemSync('dotnet add NetCoreDemos package DevExtreme.AspNet.Core --prerelease --source NetCoreDemos/NuGet/');
+  systemSync('cd NetCoreDemos && dotnet restore');
   callback();
 }
 
@@ -92,5 +87,5 @@ exports.copyAspFiles = series(
     () => src(`${aspnetPackagesPath}/*.nupkg`)
       .pipe(dest('NetCoreDemos/Nuget')),
   ),
-  installAspNetCorePackage,
+  restorePackages,
 );