Update test certificate.

Tests/MQTTnet.TestApp.UniversalWindows/MQTTnet.TestApp.UniversalWindows.csproj

@@ -18,7 +18,7 @@
     <ProjectTypeGuids>{A5A43C5B-DE2A-4C0C-9213-0A381AF9435A};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
     <WindowsXamlEnableOverview>true</WindowsXamlEnableOverview>
     <PackageCertificateKeyFile>MQTTnet.TestApp.UniversalWindows_TemporaryKey.pfx</PackageCertificateKeyFile>
-    <PackageCertificateThumbprint>05F70CAF1426E296BE2F7396F0B654070D72B930</PackageCertificateThumbprint>
+    <PackageCertificateThumbprint>1D7434E482CF034DD18C9E6AB6B12622E08FD733</PackageCertificateThumbprint>
     <RuntimeIdentifiers>win10;win10-arm;win10-arm-aot;win10-x86;win10-x86-aot;win10-x64;win10-x64-aot</RuntimeIdentifiers>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Debug|x86'">

Tests/MQTTnet.TestApp.UniversalWindows/Package.appxmanifest

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Package xmlns="http://schemas.microsoft.com/appx/manifest/foundation/windows10" xmlns:mp="http://schemas.microsoft.com/appx/2014/phone/manifest" xmlns:uap="http://schemas.microsoft.com/appx/manifest/uap/windows10" xmlns:uap3="http://schemas.microsoft.com/appx/manifest/uap/windows10/3" IgnorableNamespaces="uap mp uap3">
-  <Identity Name="4fa21172-9128-4e84-8a6d-74b9acde4d58" Publisher="CN=test" Version="1.0.0.0" />
+  <Identity Name="4fa21172-9128-4e84-8a6d-74b9acde4d58" Publisher="CN=chris" Version="1.0.0.0" />
   <mp:PhoneIdentity PhoneProductId="4fa21172-9128-4e84-8a6d-74b9acde4d58" PhonePublisherId="00000000-0000-0000-0000-000000000000" />
   <Properties>
     <DisplayName>MQTTnet.TestApp.UniversalWindows</DisplayName>