Update dependency FluentAssertions to v7

Author: renovate[bot]

tests/TurnerSoftware.Aqueduct.Tests/TurnerSoftware.Aqueduct.Tests.csproj

@@ -9,7 +9,7 @@
 	</PropertyGroup>
 
 	<ItemGroup>
-		<PackageReference Include="FluentAssertions" Version="6.12.2" />
+		<PackageReference Include="FluentAssertions" Version="7.0.0" />
 		<PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.3.2" />
 		<PackageReference Include="MSTest.TestAdapter" Version="2.2.10" />
 		<PackageReference Include="MSTest.TestFramework" Version="2.2.10" />