Update nuget package dependencies

Source/QuestPDF.ConformanceTests/QuestPDF.ConformanceTests.csproj

@@ -10,9 +10,12 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="coverlet.collector" Version="6.0.0"/>
+        <PackageReference Include="coverlet.collector" Version="6.0.4">
+          <PrivateAssets>all</PrivateAssets>
+          <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+        </PackageReference>
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.13.0" />
-        <PackageReference Include="NUnit" Version="3.14.0"/>
+        <PackageReference Include="NUnit" Version="4.4.0" />
         <PackageReference Include="NUnit.Analyzers" Version="4.11.2">
           <PrivateAssets>all</PrivateAssets>
           <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>

Source/QuestPDF.VisualTests/QuestPDF.VisualTests.csproj

@@ -12,7 +12,10 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="coverlet.collector" Version="6.0.0"/>
+        <PackageReference Include="coverlet.collector" Version="6.0.4">
+          <PrivateAssets>all</PrivateAssets>
+          <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+        </PackageReference>
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.13.0" />
         <PackageReference Include="NUnit" Version="4.4.0" />
         <PackageReference Include="NUnit.Analyzers" Version="4.11.2">