add test for checking SKData with SkiaRGBBuffer.

TestCentre/LibraryTests.fs

@@ -235,6 +235,20 @@
                 |> Async.RunSynchronously
             (result ()).IsEmpty = false
 
+        [<Property>]
+        let ``Can create a populated SKData buffer when calling createSKDataAsync with SkiaRGBBuffer`` () =
+            let result () =
+                SkiaRGBBuffer ({ filePath = fixedSkiaImagePath
+                                 red = float32 (newNum())
+                                 green = float32 (newNum())
+                                 blue = float32 (newNum())
+                                 penWidth = float32 (newPenWidth())
+                                 rows = newNum ()
+                                 columns = newNum () })
+                |> createSKDataAsync
+                |> Async.RunSynchronously
+            (result ()).IsEmpty = false
+
     module UnitTests =
 
         open System