Add support for Hangfire 1.3.0

This PR adds support for [Hangfire 1.3.0](https://github.com/HangfireIO/Hangfire/releases/tag/v1.3.0) version (no more `Common.Logging`).

* Update `Hangfire.Core` reference to version 1.3.0
* Remove `Common.Logging`, `Owin` and `Newtonsoft.Json` dependencies from nuspec.