chore(build): update dotnet version in workflows (#39)

* build: build projects using dotnet 8.0. (#38)

- Update all projects' target framework in `.NET8.0` (from `standard2.0`)
- Update all projects' C# version to 12 (from 10)
- Updated NuGet packages
- Fixes for compilation:
1. `ConcertoConverter.deserializeWithGenericType` chose the wrong overloaded method. Added expected parameters to choose the correct method.
2. Added `Decorator.cs` to declare the existence of `AccordProject.Concerto.Decorator` namespace, because the code generation script added `using AccordProject.Concerto.Decorator` for some reason and the compilation failed.

Signed-off-by: Yuval Bavli <[email protected]>
Signed-off-by: Jamie Shorten <[email protected]>

* chore(build): update dotnet version in workflows

signed-off-by: Jamie Shorten <[email protected]>
Signed-off-by: Jamie Shorten <[email protected]>

---------

Signed-off-by: Yuval Bavli <[email protected]>
Signed-off-by: Jamie Shorten <[email protected]>
Signed-off-by: Jamie Shorten <[email protected]>
Co-authored-by: ybavli-dsc <[email protected]>

Author: jamieshorten

.github/workflows/build.yml

@@ -13,7 +13,7 @@ jobs:
     strategy:
       matrix:
         node-version: [18.x, 20.x]
-        dotnet-version: ['6.0.x' ]
+        dotnet-version: ['8.0.x' ]
         os:
           - ubuntu-latest
           # - windows-latest

.github/workflows/publish.yml

@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         node-version: [20.x]
-        dotnet-version: ['6.0.x' ]
+        dotnet-version: ['8.0.x' ]
         os:
           - ubuntu-latest
           # - windows-latest