Bump AsyncFixer from 1.6.0 to 2.0.0 (#150)

Author: dependabot[bot]

Directory.Build.props

@@ -62,7 +62,7 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="AsyncFixer" Version="1.6.*">
+    <PackageReference Include="AsyncFixer" Version="2.0.0">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>