v4 -> v6 and ABP Framework -> ASP.NET Boilerplate

[davidzwa]

Thanks for making this repository public. I was confused at first glance because your project referred to Abp instead of Volo.Abp.
Then it struck me that this library is not for Abp Framework.

Please rectify the targeted name to ASP.NET Boilerplate in order to avoid confusion in future!
Also, v6 of ASP.NET Boilerplate is released, and v4.20 is now more than a year old. I also was confused as ABP Framework is now on 4.4.4 which is surprisingly close to 4.20

Best of luck!