Add a reference to MinVer, an icon, and a readme.

Author: dmytro-khmara

src/StrEnum.System.Text.Json/StrEnum.System.Text.Json.csproj

@@ -22,4 +22,14 @@
 		<PackageReference Include="StrEnum" Version="[1.4.0,2.0.0)" />
 	</ItemGroup>
 
+	<ItemGroup>
+		<None Include="..\..\README.md" Pack="true" PackagePath=""/>
+		<None Include="..\..\icon.png" Pack="true" PackagePath="" />
+
+		<PackageReference Include="MinVer" Version="3.1.0">
+			<PrivateAssets>all</PrivateAssets>
+			<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+		</PackageReference>
+	</ItemGroup>
+
 </Project>