Moved back to .Net4 to support WinXP

Author: falahati

WindowsFirewallHelper/WindowsFirewallHelper.csproj

@@ -1,9 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>netstandard2;net45</TargetFrameworks>
+    <TargetFrameworks>netstandard2;net4</TargetFrameworks>
     <PackageId>WindowsFirewallHelper</PackageId>
-    <Version>1.6.0.33</Version>
+    <Version>1.6.2.35</Version>
     <Authors>Soroush Falahati</Authors>
     <Description>A class library to manage the Windows Firewall as well as adding your program to the Windows Firewall Exception list. Supporting Windows XP+.</Description>
     <PackageLicenseUrl>https://github.com/falahati/WindowsFirewallHelper/blob/master/LICENSE</PackageLicenseUrl>
@@ -15,10 +15,9 @@
     <NeutralLanguage>en-US</NeutralLanguage>
     <Copyright>Copyright (c) 2016 Soroush Falahati</Copyright>
     <PlatformTarget>AnyCPU</PlatformTarget>
-    <Title>Windows Firewall Helper (Win XP+ - .Net 4.5)</Title>
+    <Title>Windows Firewall Helper (Win XP+ - .Net 4)</Title>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="Microsoft.CSharp" Version="4.5.0" />
     <PackageReference PrivateAssets="all" Include="MSBump" Version="2.3.2">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>