Add release notes and bump version for v2.1.3

Author: martinnormark

PreMailer.Net/PreMailer.Net/PreMailer.Net.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <TargetFrameworks>netstandard2.0;net461</TargetFrameworks>
-    <Version>2.1.1</Version>
+    <Version>2.1.3</Version>
     <Authors>Martin H. Normark</Authors>
     <Description>
         PreMailer.Net is a C# utility for moving CSS to inline style attributes, to gain maximum E-mail client compatibility.
@@ -13,8 +13,7 @@
     <PackageIconUrl>https://github.com/milkshakesoftware/PreMailer.Net/raw/master/icon.png</PackageIconUrl>
     <PackageRequireLicenseAcceptance>false</PackageRequireLicenseAcceptance>
     <PackageReleaseNotes>
-        Add support on fetching Uri with local filepath like "file:///C:/websiite/style.css" https://github.com/milkshakesoftware/PreMailer.Net/pull/182
-        Bump AngleSharp from 0.12.1 to 0.13.0 https://github.com/milkshakesoftware/PreMailer.Net/pull/176
+        Target .NETFramework4.6.1 instead of 4.6 https://github.com/milkshakesoftware/PreMailer.Net/pull/187
     </PackageReleaseNotes>
     <PackageTags>email css newsletter html</PackageTags>
     <SignAssembly>true</SignAssembly>