Added more package metadata

- Removed RC suffix

.github/workflows/pkg_release.yml

@@ -1,25 +0,0 @@
-name: Publish Nuget Package
-on:
-    push:
-        branches:
-            - "releases/**"
-jobs:
-    publish:
-        name: Github Packages Release
-        runs-on: ubuntu-latest
-        steps:
-            - uses: actions/checkout@v2
-
-            - name: Setup dotnet
-              uses: actions/setup-dotnet@v1
-              with:
-                  dotnet-version: 3.1.404
-            - name: Install dependencies
-              run: dotnet restore
-            - name: Package
-              run: dotnet pack --no-restore -o .
-            - name: Publish
-              env:
-                  NUGET_KEY: ${{ secrets.GH_PKG_KEY }}
-                  NUGET_API: https://nuget.pkg.github.com/tonytins/index.json
-              run: dotnet nuget push CSTNet.*.nupkg -k $NUGET_KEY -s $NUGET_API