Version bump for beta

Author: moonpyk

nuget/MvcDonutCaching.nuspec

@@ -2,14 +2,14 @@
 <package xmlns="http://schemas.microsoft.com/packaging/2011/08/nuspec.xsd">
     <metadata>
         <id>MvcDonutCaching</id>
-        <version>1.3.0</version>
+        <version>1.3.1-beta1</version>
         <authors>MvcDonutCaching contributors</authors>
         <owners>Clément Bourgeois</owners>
         <licenseUrl>https://raw.github.com/moonpyk/mvcdonutcaching/master/LICENSE.txt</licenseUrl>
         <projectUrl>https://github.com/moonpyk/mvcdonutcaching/</projectUrl>
         <requireLicenseAcceptance>false</requireLicenseAcceptance>
         <description>MvcDonutCaching provides extensible donut output caching for ASP.NET MVC 3 and above.</description>
-        <releaseNotes>Second release candidate for 1.3.0</releaseNotes>
+        <releaseNotes>Added VaryByHeader support</releaseNotes>
         <tags>mvc3 mvc4 mvc5 mvc51 mvc52 donut caching mvc outputcaching outputcache substitution</tags>
     </metadata>
-</package>
+</package>