automate publish to Nuget

(cherry picked from commit 536c93d)

.github/workflows/nuget.yml

@@ -0,0 +1,50 @@
+name: Publish NuGet
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'Version number'
+        required: true
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    env:
+      PROJECT_FILE: src/FSharp.Finance.Personal.fsproj
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Setup .NET Core
+        uses: actions/setup-dotnet@v1
+
+      - name: Get current version
+        id: get_version
+        run: |
+          CURRENT_VERSION=$(grep -oP '(?<=<Version>)[^<]+' ${{ env.PROJECT_FILE }})
+          echo "Current version is $CURRENT_VERSION"
+          echo "::set-output name=current_version::$CURRENT_VERSION"
+
+      - name: Update version number
+        run: |
+          VERSION=${{ github.event.inputs.version }}
+          echo "Updating version to $VERSION"
+          sed -i "s/<Version>[0-9]\+\.[0-9]\+\.[0-9]\+<\/Version>/<Version>$VERSION<\/Version>/" ${{ env.PROJECT_FILE }}
+
+      - name: Build
+        run: dotnet build -c Release
+
+      - name: Pack
+        run: dotnet pack -c Release --no-build --output .
+
+    #   - name: Publish NuGet package
+    #     run: dotnet nuget push *.nupkg --api-key ${{ secrets.NUGET_KEY }} --source https://api.nuget.org/v3/index.json
+
+      - name: Create Git tag
+        run: |
+          git config --global user.name 'github-actions'
+          git config --global user.email 'github-actions@github.com'
+          git tag $VERSION
+          git push origin $VERSION