Migrate to netstandard2.0

[vhatsura]

For #16
Some tricky cases:

1. RazorEngine isn't compatible with netstandard. Replate with RazorLight nuget package
2. GraphRunner has async interface due to async-only interface in RazorLight engine. It's a breaking change. For backward compatibility, was added non-async methods, which are called async methods with GetAwaiter().GetResult(). Such methods can be marked as Obsolete

[wozzo]

Looking on my phone at the moment and mostly looks good but will do a proper look soon. Couple of things for the meantime. Theres one of the cake generated scripts been added could that be removed - 645a1e2b-a9f4-459e-8d5e-a517e430b274.cake
There's a couple of async methods which could have the async and awaits removed. If the result of an awaited method is being immediately returned then the task itself can be returned - ParseAndCacheRazorTemplateAsync for example. Hope that makes sense. Oh amd just an fyi if you're writing library code like this then 99% of the time you should add .ConfigureAwait(false) when you do need to await. I'll see if I can look out a link which explains why but it's basically to allow the method to resume in a different thread context which is more efficient.
Thanks again for looking at this

[vhatsura]

Thank for fast response.
Regarding ConfigureAwait. ConfigureAwait(false) should be specified to avoid deadlocks, which can be occured in UI and ASP.Net (not ASP.Net Core) application. JFYI, Synchronization context was removed from ASP.Net Core (http://blog.stephencleary.com/2017/03/aspnetcore-synchronization-context.html).
So, as I understand Cake.Graph can be used in Cake related projects, which is run under Console Application. In this case, I think, it doesn't make any sense to specify ConfigureAwait(false)

[wozzo]

Oh yeah. Spot on. Still mostly working in framework so forget about things like that.

…

________________________________ From: Vadim Hatsura <notifications@github.com> Sent: Wednesday, September 26, 2018 9:42:44 PM To: cake-contrib/Cake.Graph Cc: Warren; Comment Subject: Re: [cake-contrib/Cake.Graph] Migrate to netstandard2.0 (#17) So, regarding ConfigureAwait. , it make sense only for .Net Framework. In Asp .Net Core SynchronizationContext was removed (http://blog.stephencleary.com/2017/03/aspnetcore-synchronization-context.html) — You are receiving this because you commented. Reply to this email directly, view it on GitHub<#17 (comment)>, or mute the thread<https://github.com/notifications/unsubscribe-auth/AF5xC6RLBgORwnJwJ3IHui-c-0oh9UyIks5ue-bEgaJpZM4W4bJe>.

[wozzo]

Cool. Looks good. Thanks for your contribution