C#13: Add the "allow byref-like" anti-constraint #290

	name: CI

	on:
	push:
	branches:
	- master
	- release/*
	pull_request:
	branches:
	- master
	- release/*

	jobs:
	windows:
	runs-on: windows-latest
	steps:
	- uses: actions/checkout@v1
	- name: Build
	run: dotnet build -c Debug Mono.Cecil.sln
	- name: Test
	run: dotnet test --no-build -c Debug Mono.Cecil.sln
	linux:
	runs-on: ubuntu-20.04
	steps:
	- uses: actions/checkout@v1
	- name: Build
	run: dotnet build -c Debug Mono.Cecil.sln
	- name: Test .NET Core
	run: dotnet test --no-build -c Debug Mono.Cecil.sln
	- name: Get NuGet
	run: curl -o ./nuget.exe https://dist.nuget.org/win-x86-commandline/latest/nuget.exe
	- name: Get NUnit.Console
	run: mono ./nuget.exe install NUnit.Console -Version 3.9.0 -OutputDirectory ./packages
	- name: Test .NET 4.0 using Mono
	run: mono ./packages/NUnit.ConsoleRunner.3.9.0/tools/nunit3-console.exe ./Mono.Cecil.nunit

Provide feedback