feat: support netstandard2.0 #57

	name: Push NuGet package

	on:
	push:
	branches: [ main ]
	pull_request:
	# Sequence of patterns matched against refs/heads
	branches:
	- main

	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3
	- name: Setup .NET
	uses: actions/setup-dotnet@v3
	with:
	global-json-file: global.json
	- name: Install dependencies
	run: dotnet restore
	- name: Build
	run: \|
	echo "running on $GITHUB_REF_NAME"
	dotnet build --configuration Release --no-restore
	- name: Test
	run: dotnet test --configuration Release --no-build --verbosity normal
	- name: Pack release
	if: ${{ github.ref_name == 'main' }}
	run: dotnet pack --configuration Release --no-build
	- name: Pack RC
	if: ${{ github.ref_name != 'main' }}
	run: dotnet pack --configuration Release --no-build --version-suffix "rc.${GITHUB_RUN_NUMBER}"
	- name: Push
	run: dotnet nuget push ./src/N.SourceGenerators.UnionTypes/nupkg/*.nupkg -k ${{ secrets.NUGET_ORG_API_KEY }} -s https://api.nuget.org/v3/index.json --skip-duplicate

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