Upgrade FluentAssertions tooling

Author: jburnett

test/IntListRandomizerTests.cs

@@ -122,11 +122,11 @@ public void verify_excp_on_empty_list()
 
 			// Test via the method taking ICollection
 			Action act = () => list.Random();
-			act.ShouldThrow<ArgumentOutOfRangeException>();
+			act.Should().Throw<ArgumentOutOfRangeException>();
 
 			// Test via the method taking IEnumerable
 			act = () => (list as IEnumerable<string>).Random();
-			act.ShouldThrow<ArgumentOutOfRangeException>();
+			act.Should().Throw<ArgumentOutOfRangeException>();
 		}
 
 		#endregion Negative tests

test/test.csproj

@@ -22,7 +22,7 @@
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="*" />
     <PackageReference Include="xunit.runner.visualstudio" Version="*" />
     <PackageReference Include="xunit" Version="*" />
-    <PackageReference Include="FluentAssertions" Version="4.*" />
+    <PackageReference Include="FluentAssertions" Version="*" />
   </ItemGroup>
 
 </Project>