Update to .NET 7.0

Author: NikolayIT

Source/RtfDomParser.Tests/RtfDomParser.Tests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net6.0-windows</TargetFramework>
+    <TargetFramework>net7.0-windows</TargetFramework>
     <IsPackable>false</IsPackable>
     <UseWindowsForms>true</UseWindowsForms>
 

Source/RtfDomParser.WinFormsDemo/RtfDomParser.WinFormsDemo.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>WinExe</OutputType>
-    <TargetFramework>net6.0-windows</TargetFramework>
+    <TargetFramework>net7.0-windows</TargetFramework>
     <UseWindowsForms>true</UseWindowsForms>
 
     <RootNamespace>RtfDomParser.Test</RootNamespace>

Source/RtfDomParser/RtfDomParser.csproj

@@ -1,15 +1,15 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net7.0</TargetFramework>
 
     <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
     <Deterministic>false</Deterministic>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="System.Drawing.Common" Version="5.0.3" />
-    <PackageReference Include="System.Text.Encoding.CodePages" Version="6.0.0" />
+    <PackageReference Include="System.Drawing.Common" Version="7.0.0" />
+    <PackageReference Include="System.Text.Encoding.CodePages" Version="7.0.0" />
   </ItemGroup>
 
 </Project>