Add publish nuget git action #4

	name: Build and publish package

	# Controls when the action will run. Triggers the workflow on push or pull request
	# events but only for the master branch
	on:
	push:
	branches: [ master ]

	# A workflow run is made up of one or more jobs that can run sequentially or in parallel
	jobs:
	# This workflow contains a single job called "build"
	build:
	# The type of runner that the job will run on
	runs-on: ubuntu-latest
	steps:
	- name: Checkout repository
	uses: actions/checkout@master

	- name: Setup .NET environment
	uses: actions/setup-dotnet@v1
	with:
	dotnet-version: '6.0.100'

	- name: Build project
	working-directory: ./CsvHelper.FastDynamic
	run: dotnet build --configuration Release

	- name: Generate a NuGet package
	working-directory: ./CsvHelper.FastDynamic
	run: dotnet pack --no-build -c Release -o .

	- name: Push to GitHub package registry
	working-directory: ./CsvHelper.FastDynamic
	run: dotnet nuget push "*.nupkg" -k ${{secrets.NUGETORGTOKEN}} -s "https://api.nuget.org/v3/index.json" --skip-duplicate

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