Update To Stable Dependencies (#395)

* Update ImageSharp.Drawing.csproj

* Update TestMemoryAllocator.cs

Author: JimBobSquarePants

src/ImageSharp.Drawing/ImageSharp.Drawing.csproj

@@ -40,9 +40,9 @@
     <None Include="..\..\shared-infrastructure\branding\icons\imagesharp.drawing\sixlabors.imagesharp.drawing.128.png" Pack="true" PackagePath="" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="SixLabors.Fonts" Version="3.0.0-alpha.0.48" />
-    <PackageReference Include="SixLabors.ImageSharp" Version="4.0.0-alpha.0.106" />
-    <PackageReference Include="SixLabors.PolygonClipper" Version="1.0.0-alpha.0.58" />
+    <PackageReference Include="SixLabors.Fonts" Version="3.0.0" />
+    <PackageReference Include="SixLabors.ImageSharp" Version="4.0.0" />
+    <PackageReference Include="SixLabors.PolygonClipper" Version="1.0.0" />
   </ItemGroup>
 
   <Import Project="..\..\shared-infrastructure\src\SharedInfrastructure\SharedInfrastructure.projitems" Label="Shared" />

tests/ImageSharp.Drawing.Tests/TestUtilities/TestMemoryAllocator.cs

@@ -28,7 +28,7 @@ internal class TestMemoryAllocator : MemoryAllocator
 
     protected internal override int GetBufferCapacityInBytes() => this.BufferCapacityInBytes;
 
-    public override IMemoryOwner<T> Allocate<T>(int length, AllocationOptions options = AllocationOptions.None)
+    protected override AllocationTrackedMemoryManager<T> AllocateCore<T>(int length, AllocationOptions options = AllocationOptions.None)
     {
         T[] array = this.AllocateArray<T>(length, options);
         return new BasicArrayBuffer<T>(array, length, this);
@@ -95,7 +95,7 @@ public struct ReturnRequest
     /// <summary>
     /// Wraps an array as an <see cref="IManagedByteBuffer"/> instance.
     /// </summary>
-    private class BasicArrayBuffer<T> : MemoryManager<T>
+    private class BasicArrayBuffer<T> : AllocationTrackedMemoryManager<T>
         where T : struct
     {
         private readonly TestMemoryAllocator allocator;
@@ -140,7 +140,7 @@ public override unsafe MemoryHandle Pin(int elementIndex = 0)
         public override void Unpin() => throw new NotImplementedException();
 
         /// <inheritdoc />
-        protected override void Dispose(bool disposing)
+        protected override void DisposeCore(bool disposing)
         {
             if (disposing)
             {