Added global.json file to force which version of compiler is used when building

Author: ProgrammerAL

.github/workflows/build-publish-nuget.yml

@@ -19,7 +19,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     env:
-      DOTNET_VERSION: 8.x.x
+      DOTNET_VERSION: 8.0.100 # same version that's in global.json. Use low version so clients can use it with an older version of compiler
       SRC_DIRECTORY_PATH_LIB: ${{ github.workspace }}/src
       NUGET_VERSION: ${{ github.event.inputs.nuget_version_override || '0.1.0-preview' }}.${{ github.run_number }}
       PUSH_NUGET: ${{ github.event.inputs.push_nuget || false }}

global.json

@@ -0,0 +1,6 @@
+{
+    "sdk": {
+      "version": "8.0.100",
+      "rollForward": "disable"
+    }
+  }