Bump FodyHelpers from 3.3.5 to 4.0.2 (reactiveui#1947)

Bumps [FodyHelpers](https://github.com/Fody/Fody) from 3.3.5 to 4.0.2.
- [Release notes](https://github.com/Fody/Fody/releases)
- [Commits](Fody/Fody@3.3.5...4.0.2)

Signed-off-by: dependabot[bot] <support@dependabot.com>

src/ReactiveUI.Fody/ReactiveUI.Fody.csproj

@@ -7,6 +7,6 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="FodyHelpers" Version="3.3.5" />
+    <PackageReference Include="FodyHelpers" Version="4.0.2" />
   </ItemGroup>
 </Project>