Move to GitHub actions (loic-sharma#663)

Move to GitHub actions. Upgrade sample project to .NET 3.1 TFM for long term support.

.github/workflows/main.yml

@@ -0,0 +1,28 @@
+name: Build
+
+on:
+  # Triggers the workflow on push or pull request events but only for the main branch
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Setup .NET
+      uses: actions/setup-dotnet@v1
+      with:
+        dotnet-version: 3.1.x
+    - name: Restore dependencies
+      run: dotnet restore
+    - name: Build
+      run: dotnet build --no-restore
+    - name: Test
+      run: dotnet test --no-build --verbosity normal

.github/workflows/publish.yml

@@ -0,0 +1,31 @@
+name: Publish to nuget.org
+
+on:
+  workflow_dispatch:
+    inputs:
+      packageVersion:
+        description: 'Package version'
+        required: true
+        default: '1.0.0-preview1'
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Setup .NET
+      uses: actions/setup-dotnet@v1
+      with:
+        dotnet-version: 3.1.x
+    - name: Restore dependencies
+      run: dotnet restore
+    - name: Build
+      run: dotnet build --no-restore
+    - name: Test
+      run: dotnet test --no-build --verbosity normal
+    - name: Pack
+      run: dotnet pack --configuration Release -p:PackageVersion=${{ github.event.inputs.packageVersion }}
+    - name: Push
+      run: dotnet nuget push ./bin/Release/*.nupkg -s https://dev.nugettest.org/v3/index.json -k ${{secrets.NUGET_API_KEY}}

samples/BaGet.Protocol.Samples.Tests/BaGet.Protocol.Samples.Tests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.0</TargetFramework>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
 
     <IsPackable>false</IsPackable>
     <NoWarn>IDE0007</NoWarn>