Bump jQuery.Validation

Bumps jQuery.Validation from 1.12.0 to 1.19.4.

---
updated-dependencies:
- dependency-name: jQuery.Validation
  dependency-type: direct:production
...

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

samples/aspnet/WebApi/CustomMediaTypeFormatterSample/CustomMediaTypeFormatter/packages.config

@@ -1,10 +1,10 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="Antlr" version="3.4.1.9004" targetFramework="net45" />
   <package id="EntityFramework" version="6.1.1" targetFramework="net45" />
   <package id="jQuery" version="2.1.1" targetFramework="net45" />
   <package id="jQuery.UI.Combined" version="1.10.4" targetFramework="net45" />
-  <package id="jQuery.Validation" version="1.12.0" targetFramework="net45" />
+  <package id="jQuery.Validation" version="1.19.4" targetFramework="net45" />
   <package id="knockoutjs" version="3.1.0" targetFramework="net45" />
   <package id="Microsoft.AspNet.Mvc" version="5.2.0" targetFramework="net45" />
   <package id="Microsoft.AspNet.Providers.Core" version="2.0.0" targetFramework="net45" />