Derive Web API templates from ControllerBase (#220)

Addresses #45

src/Microsoft.DotNet.Web.ProjectTemplates/content/EmptyWeb-FSharp/Startup.fs

@@ -1,5 +1,6 @@
 namespace Company.WebApplication1
 
+open System
 open Microsoft.AspNetCore.Builder
 open Microsoft.AspNetCore.Hosting
 open Microsoft.AspNetCore.Http

src/Microsoft.DotNet.Web.ProjectTemplates/content/StarterWeb-FSharp/Startup.fs

@@ -1,5 +1,9 @@
 namespace Company.WebApplication1
 
+open System
+open System.Collections.Generic
+open System.Linq
+open System.Threading.Tasks
 open Microsoft.AspNetCore.Builder
 open Microsoft.AspNetCore.Hosting
 open Microsoft.AspNetCore.HttpsPolicy

src/Microsoft.DotNet.Web.ProjectTemplates/content/WebApi-CSharp/Controllers/ValuesController.cs

@@ -13,7 +13,8 @@ namespace Company.WebApplication1.Controllers
     [Authorize]
 #endif
     [Route("api/[controller]")]
-    public class ValuesController : Controller
+    [ApiController]
+    public class ValuesController : ControllerBase
     {
         // GET api/values
         [HttpGet]

src/Microsoft.DotNet.Web.ProjectTemplates/content/WebApi-FSharp/Controllers/ValuesController.fs

@@ -7,8 +7,9 @@ open System.Threading.Tasks
 open Microsoft.AspNetCore.Mvc
 
 [<Route("api/[controller]")>]
+[<ApiController>]
 type ValuesController () =
-    inherit Controller()
+    inherit ControllerBase()
 
     [<HttpGet>]
     member this.Get() =

src/Microsoft.DotNet.Web.ProjectTemplates/content/WebApi-FSharp/Startup.fs

@@ -1,5 +1,9 @@
 namespace Company.WebApplication1
 
+open System
+open System.Collections.Generic
+open System.Linq
+open System.Threading.Tasks
 open Microsoft.AspNetCore.Builder
 open Microsoft.AspNetCore.Hosting
 open Microsoft.AspNetCore.HttpsPolicy