Bump ReactiveUI from 13.2.18 to 13.3.1 (#1298)

Bumps [ReactiveUI](https://github.com/reactiveui/reactiveui) from 13.2.18 to 13.3.1.
- [Release notes](https://github.com/reactiveui/reactiveui/releases)
- [Commits](https://github.com/reactiveui/reactiveui/compare/13.2.18...13.3.1)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

ReactiveExample/ReactiveExample.csproj

@@ -8,6 +8,6 @@
         <PackageReference Include="Pharmacist.Common" Version="2.0.8" />
         <PackageReference Include="Terminal.Gui" Version="1.0.0.*" />
         <PackageReference Include="ReactiveUI.Fody" Version="13.2.18" />
-        <PackageReference Include="ReactiveUI" Version="13.2.18" />
+        <PackageReference Include="ReactiveUI" Version="13.3.1" />
     </ItemGroup>
 </Project>