BREAKING CHANGE: Update to net5.0 (#60)

* BREAKING CHANGE: Update to net5.0

- migrate the project to .NET 5.0
- fix: #42
- fix: #54
- fix: #56

* chore: update ci

* fix: #55 make FormattedLogObject public

* chore: address pr feedback

Author: attilah

.github/workflows/ci.yml

@@ -15,6 +15,6 @@ jobs:
     - name: Setup .NET Core
       uses: actions/setup-dotnet@v1
       with:
-        dotnet-version: 3.1.201
+        dotnet-version: 5.0.x
     - name: Build
       run: dotnet build --configuration Release

.github/workflows/publish.yml

@@ -15,7 +15,7 @@ jobs:
     - name: Setup .NET Core
       uses: actions/setup-dotnet@v1
       with:
-        dotnet-version: 3.1.201
+        dotnet-version: 5.0.x
     - name: Build
       run: dotnet build --configuration Release
     - name: Pack