fix OneWayBind selector, rollback UNO version

src/ReactiveUI.Tests/API/ApiApprovalTests.ReactiveUI.net472.approved.txt

@@ -579,7 +579,7 @@ namespace ReactiveUI
             where TView :  class, ReactiveUI.IViewFor { }
         public static System.IDisposable BindTo<TValue, TTarget, TTValue>(this System.IObservable<TValue> @this, TTarget? target, System.Linq.Expressions.Expression<System.Func<TTarget, TTValue?>> property, object? conversionHint = null, ReactiveUI.IBindingTypeConverter? vmToViewConverterOverride = null)
             where TTarget :  class { }
-        public static ReactiveUI.IReactiveBinding<TView, TOut> OneWayBind<TViewModel, TView, TProp, TOut>(this TView view, TViewModel? viewModel, System.Linq.Expressions.Expression<System.Func<TViewModel, TProp?>> vmProperty, System.Linq.Expressions.Expression<System.Func<TView, TOut>> viewProperty, System.Func<TProp?, TOut> selector)
+        public static ReactiveUI.IReactiveBinding<TView, TOut> OneWayBind<TViewModel, TView, TProp, TOut>(this TView view, TViewModel? viewModel, System.Linq.Expressions.Expression<System.Func<TViewModel, TProp?>> vmProperty, System.Linq.Expressions.Expression<System.Func<TView, TOut>> viewProperty, System.Func<TProp, TOut> selector)
             where TViewModel :  class
             where TView :  class, ReactiveUI.IViewFor { }
         public static ReactiveUI.IReactiveBinding<TView, TVProp> OneWayBind<TViewModel, TView, TVMProp, TVProp>(this TView view, TViewModel? viewModel, System.Linq.Expressions.Expression<System.Func<TViewModel, TVMProp?>> vmProperty, System.Linq.Expressions.Expression<System.Func<TView, TVProp>> viewProperty, object? conversionHint = null, ReactiveUI.IBindingTypeConverter? vmToViewConverterOverride = null)

src/ReactiveUI.Tests/API/ApiApprovalTests.ReactiveUI.net5.0.approved.txt

@@ -572,7 +572,7 @@ namespace ReactiveUI
             where TView :  class, ReactiveUI.IViewFor { }
         public static System.IDisposable BindTo<TValue, TTarget, TTValue>(this System.IObservable<TValue> @this, TTarget? target, System.Linq.Expressions.Expression<System.Func<TTarget, TTValue?>> property, object? conversionHint = null, ReactiveUI.IBindingTypeConverter? vmToViewConverterOverride = null)
             where TTarget :  class { }
-        public static ReactiveUI.IReactiveBinding<TView, TOut> OneWayBind<TViewModel, TView, TProp, TOut>(this TView view, TViewModel? viewModel, System.Linq.Expressions.Expression<System.Func<TViewModel, TProp?>> vmProperty, System.Linq.Expressions.Expression<System.Func<TView, TOut>> viewProperty, System.Func<TProp?, TOut> selector)
+        public static ReactiveUI.IReactiveBinding<TView, TOut> OneWayBind<TViewModel, TView, TProp, TOut>(this TView view, TViewModel? viewModel, System.Linq.Expressions.Expression<System.Func<TViewModel, TProp?>> vmProperty, System.Linq.Expressions.Expression<System.Func<TView, TOut>> viewProperty, System.Func<TProp, TOut> selector)
             where TViewModel :  class
             where TView :  class, ReactiveUI.IViewFor { }
         public static ReactiveUI.IReactiveBinding<TView, TVProp> OneWayBind<TViewModel, TView, TVMProp, TVProp>(this TView view, TViewModel? viewModel, System.Linq.Expressions.Expression<System.Func<TViewModel, TVMProp?>> vmProperty, System.Linq.Expressions.Expression<System.Func<TView, TVProp>> viewProperty, object? conversionHint = null, ReactiveUI.IBindingTypeConverter? vmToViewConverterOverride = null)

src/ReactiveUI.Tests/API/ApiApprovalTests.ReactiveUI.netcoreapp3.1.approved.txt

@@ -572,7 +572,7 @@ namespace ReactiveUI
             where TView :  class, ReactiveUI.IViewFor { }
         public static System.IDisposable BindTo<TValue, TTarget, TTValue>(this System.IObservable<TValue> @this, TTarget? target, System.Linq.Expressions.Expression<System.Func<TTarget, TTValue?>> property, object? conversionHint = null, ReactiveUI.IBindingTypeConverter? vmToViewConverterOverride = null)
             where TTarget :  class { }
-        public static ReactiveUI.IReactiveBinding<TView, TOut> OneWayBind<TViewModel, TView, TProp, TOut>(this TView view, TViewModel? viewModel, System.Linq.Expressions.Expression<System.Func<TViewModel, TProp?>> vmProperty, System.Linq.Expressions.Expression<System.Func<TView, TOut>> viewProperty, System.Func<TProp?, TOut> selector)
+        public static ReactiveUI.IReactiveBinding<TView, TOut> OneWayBind<TViewModel, TView, TProp, TOut>(this TView view, TViewModel? viewModel, System.Linq.Expressions.Expression<System.Func<TViewModel, TProp?>> vmProperty, System.Linq.Expressions.Expression<System.Func<TView, TOut>> viewProperty, System.Func<TProp, TOut> selector)
             where TViewModel :  class
             where TView :  class, ReactiveUI.IViewFor { }
         public static ReactiveUI.IReactiveBinding<TView, TVProp> OneWayBind<TViewModel, TView, TVMProp, TVProp>(this TView view, TViewModel? viewModel, System.Linq.Expressions.Expression<System.Func<TViewModel, TVMProp?>> vmProperty, System.Linq.Expressions.Expression<System.Func<TView, TVProp>> viewProperty, object? conversionHint = null, ReactiveUI.IBindingTypeConverter? vmToViewConverterOverride = null)

src/ReactiveUI.Uno/ReactiveUI.Uno.csproj

@@ -22,7 +22,7 @@
   </ItemGroup>
 
   <ItemGroup Condition=" !$(TargetFramework.StartsWith('uap')) ">
-    <PackageReference Include="Uno.UI" Version="3.10.0-dev.725" />
+    <PackageReference Include="Uno.UI" Version="3.9.7" />
   </ItemGroup>
 
   <ItemGroup Condition=" $(TargetFramework.StartsWith('netstandard')) ">

src/ReactiveUI/Bindings/Property/PropertyBindingMixins.cs

@@ -294,7 +294,7 @@ public static IReactiveBinding<TView, TOut> OneWayBind<TViewModel, TView, TProp,
                 TViewModel? viewModel,
                 Expression<Func<TViewModel, TProp?>> vmProperty,
                 Expression<Func<TView, TOut>> viewProperty,
-                Func<TProp?, TOut> selector)
+                Func<TProp, TOut> selector)
             where TViewModel : class
             where TView : class, IViewFor =>
             _binderImplementation.OneWayBind(viewModel, view, vmProperty, viewProperty, selector);