Removed .NET Framework 4.5.1 support again

.github/workflows/build.yml

@@ -7,7 +7,7 @@ on:
 jobs:
   build:
 
-    runs-on: windows-latest
+    runs-on: ubuntu-latest
 
     steps:
     - uses: actions/checkout@v2

README.md

@@ -3,7 +3,7 @@
 [![Build Status](https://travis-ci.org/seatsio/seatsio-dotnet.svg?branch=master)](https://travis-ci.org/seatsio/seatsio-dotnet)
 [![NuGet](https://img.shields.io/nuget/v/SeatsioDotNet.svg)](https://www.nuget.org/packages/SeatsioDotNet/)
 
-The official Seats.io library, supporting .NET Standard 2.0+, .NET Core 2.0+ and .NET Framework 4.5.2+
+The official Seats.io library, supporting .NET Standard 2.0+ and .NET Core 2.0+
 
 ## Installing seatsio-dotnet
 

SeatsioDotNet/SeatsioDotNet.csproj

@@ -9,12 +9,10 @@
     <PackageProjectUrl>https://github.com/seatsio/seatsio-dotnet</PackageProjectUrl>
     <RepositoryUrl>https://github.com/seatsio/seatsio-dotnet</RepositoryUrl>
     <PackageLicenseUrl>https://raw.githubusercontent.com/seatsio/seatsio-dotnet/master/LICENSE</PackageLicenseUrl>
-    <TargetFrameworks>net452;netstandard2.0</TargetFrameworks>
+    <TargetFrameworks>netstandard2.0</TargetFrameworks>
   </PropertyGroup>
-  <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard2.0' ">
-    <PackageReference Include="Microsoft.CSharp" Version="4.4.1" />
-  </ItemGroup>
   <ItemGroup>
+    <PackageReference Include="Microsoft.CSharp" Version="4.4.1" />
     <PackageReference Include="Newtonsoft.Json" Version="11.0.1" />
     <PackageReference Include="RestSharp" Version="106.11.7" />
   </ItemGroup>