Bump FluentAssertions from 5.6.0 to 5.7.0 in /Ix.NET/Source

Bumps [FluentAssertions](https://github.com/fluentassertions/fluentassertions) from 5.6.0 to 5.7.0.
- [Release notes](https://github.com/fluentassertions/fluentassertions/releases)
- [Commits](https://github.com/fluentassertions/fluentassertions/compare/5.6.0...5.7.0)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Ix.NET/Source/System.Interactive.Async.Providers.Tests/System.Interactive.Async.Providers.Tests.csproj

@@ -23,7 +23,7 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="FluentAssertions" Version="5.6.0" />
+    <PackageReference Include="FluentAssertions" Version="5.7.0" />
 
     <PackageReference Include="xunit" Version="2.4.1" />
   </ItemGroup>

Ix.NET/Source/System.Interactive.Async.Tests/System.Interactive.Async.Tests.csproj

@@ -20,7 +20,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.2.0" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.1" />
-    <PackageReference Include="FluentAssertions" Version="5.6.0" />
+    <PackageReference Include="FluentAssertions" Version="5.7.0" />
     <PackageReference Include="xunit" Version="2.4.1" />
 
   </ItemGroup>

Ix.NET/Source/System.Interactive.Tests/System.Interactive.Tests.csproj

@@ -22,7 +22,7 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="FluentAssertions" Version="5.6.0" />
+    <PackageReference Include="FluentAssertions" Version="5.7.0" />
     
     <PackageReference Include="xunit" Version="2.4.1" />
   </ItemGroup>

Ix.NET/Source/System.Linq.Async.Queryable.Tests/System.Linq.Async.Queryable.Tests.csproj

@@ -20,7 +20,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.2.0" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.1" />
-    <PackageReference Include="FluentAssertions" Version="5.6.0" />
+    <PackageReference Include="FluentAssertions" Version="5.7.0" />
     <PackageReference Include="xunit" Version="2.4.1" />
   </ItemGroup>
 

Ix.NET/Source/System.Linq.Async.Tests/System.Linq.Async.Tests.csproj

@@ -43,7 +43,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.2.0" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.1" />
-    <PackageReference Include="FluentAssertions" Version="5.6.0" />
+    <PackageReference Include="FluentAssertions" Version="5.7.0" />
 
     <PackageReference Include="xunit" Version="2.4.1" />
   </ItemGroup>