Bump Microsoft.AspNet.Identity.Owin from 2.2.3 to 2.2.4 in /mothercare

Bumps [Microsoft.AspNet.Identity.Owin](https://github.com/aspnet/AspNetIdentity) from 2.2.3 to 2.2.4.
- [Commits](https://github.com/aspnet/AspNetIdentity/commits)

---
updated-dependencies:
- dependency-name: Microsoft.AspNet.Identity.Owin
  dependency-type: direct:production
...

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

mothercare/packages.config

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="Antlr" version="3.5.0.2" targetFramework="net472" />
   <package id="bootstrap" version="3.4.1" targetFramework="net472" />
@@ -7,7 +7,7 @@
   <package id="jQuery.Validation" version="1.19.3" targetFramework="net472" />
   <package id="Microsoft.AspNet.Identity.Core" version="2.2.3" targetFramework="net472" />
   <package id="Microsoft.AspNet.Identity.EntityFramework" version="2.2.3" targetFramework="net472" />
-  <package id="Microsoft.AspNet.Identity.Owin" version="2.2.3" targetFramework="net472" />
+  <package id="Microsoft.AspNet.Identity.Owin" version="2.2.4" targetFramework="net472" />
   <package id="Microsoft.AspNet.Mvc" version="5.2.7" targetFramework="net472" />
   <package id="Microsoft.AspNet.Razor" version="3.2.7" targetFramework="net472" />
   <package id="Microsoft.AspNet.Web.Optimization" version="1.1.3" targetFramework="net472" />