Chore: Bump version to 6.0.0

Author: paulirwin

src/F23.StringSimilarity/F23.StringSimilarity.csproj

@@ -16,7 +16,7 @@
     <PublishRepositoryUrl>true</PublishRepositoryUrl>
     <IncludeSymbols>true</IncludeSymbols>
     <SymbolPackageFormat>snupkg</SymbolPackageFormat>
-    <Version>5.1.0</Version>
+    <Version>6.0.0</Version>
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.1.1" PrivateAssets="All" />