Add all .NETFramework to targetFramework

Author: mee-ironsoftware

NuGet/IronSoftware.Drawing.nuspec

@@ -45,7 +45,13 @@ All new classes developed to support conversion between: (System.Drawing, SixLab
 		<copyright>Copyright © Iron Software 2022</copyright>
 		<tags>Images, Bitmap, SkiaSharp, SixLabors, BitMiracle, Maui, SVG, Tiff, Gif, Jpeg, Png, Color, Rectangle, Drawing, C#, VB.NET, aspx, create, render, generate, standard, netstandard2.0, core, netcore</tags>
 		<dependencies>
-			<group targetFramework=".NETFramework4.7.2">
+			<group targetFramework="net462">
+				<dependency id="SixLabors.ImageSharp.Drawing" version="1.0.0-beta15" />	
+			</group>
+			<group targetFramework="net472">
+				<dependency id="SixLabors.ImageSharp.Drawing" version="1.0.0-beta15" />	
+			</group>
+			<group targetFramework="net48">
 				<dependency id="SixLabors.ImageSharp.Drawing" version="1.0.0-beta15" />	
 			</group>
 			<group targetFramework="netstandard20">