net472 implements netstandard20, so we shouldn't need to explicitly t…

…arget it

Unify build targets across csproj files
Update nuget package version

.gitignore

@@ -1,3 +1,6 @@
+## OS-specific files
+.DS_Store
+
 ## Benchmark.net files
 *.html
 *.csv

net-core/Ical.Net.CoreUnitTests/Ical.Net.CoreUnitTests.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk" ToolsVersion="15.0">
  <PropertyGroup>
- <TargetFramework>netcoreapp3.1</TargetFramework>
+ <TargetFrameworks>netcoreapp3.1;net50</TargetFrameworks>
  <SignAssembly>true</SignAssembly>
  <AssemblyOriginatorKeyFile>..\..\IcalNetStrongnameKey.snk</AssemblyOriginatorKeyFile>
  </PropertyGroup>

net-core/Ical.Net/Ical.Net.csproj

@@ -1,17 +1,17 @@
 <Project Sdk="Microsoft.NET.Sdk" ToolsVersion="15.0">
  <PropertyGroup>
- <TargetFrameworks>netstandard2.0;net472</TargetFrameworks>
- <Version>5.0.0</Version>
- <Authors>Rian Stockbower, Douglas Day &amp; Contributors</Authors>
+ <TargetFrameworks>netstandard2.0;net50</TargetFrameworks>
+ <Version>4.2.0</Version>
+ <Authors>Rian Stockbower, Douglas Day, &amp; Contributors</Authors>
  <Company />
  <SignAssembly>true</SignAssembly>
  <AssemblyOriginatorKeyFile>..\..\IcalNetStrongnameKey.snk</AssemblyOriginatorKeyFile>
  <DebugSymbols>true</DebugSymbols>
  <DebugType>full</DebugType>
- <PackageId>Fusonic.Ical.Net</PackageId>
+ <PackageId>Ical.Net</PackageId>
  <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
  <PackageLicenseFile>license.md</PackageLicenseFile>
- <Description>An iCalendar (RFC 5545) control library. See https://github.com/rianjs/ical.net for details.</Description>
+ <Description>An iCalendar (RFC 5545) library. See https://github.com/rianjs/ical.net for details.</Description>
  </PropertyGroup>
  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|AnyCPU'">
  <DocumentationFile>bin\Release\Ical.Net.xml</DocumentationFile>

net-core/PerfTests/PerfTests.csproj

@@ -2,7 +2,7 @@
 
  <PropertyGroup>
  <OutputType>Exe</OutputType>
- <TargetFramework>netcoreapp3.0</TargetFramework>
+ <TargetFrameworks>netcoreapp3.1;net50</TargetFrameworks>
  </PropertyGroup>
 
  <ItemGroup>