Replaces all instances of {YEAR} in copyrights with the current year. Works with the MSBuild Copyright property and AssemblyCopyright attribute. Assign the <CopyrightYearAssemblyInfo> property in your project file as your input assembly info file if you're using an one different from Properties\AssemblyInfo.cs. This does NOT work for NuGet packages generated by Sdk projects. Use $([System.DateTime]::Now.Year) for these projects instead of {YEAR}.
$ dotnet add package TriggersTools.Build.CopyrightYearNo README available.