v3.7.0.dev01

What's Changed

• Adjust caching for our concat tables by @ThomasHepworth in #1013
• _initialise_df_concat optionally returns list by @RobinL in #1023
• Df concat and df concat with tf return SplinkDataframe or None by @RobinL in #1033
• [Docs] Add a dev guide for creating new ComparisonLevels and Comparisons to Splink libraries by @ADBond in #1041
• correct module name duckb_base -> duckdb_base by @ADBond in #1046
• Some cache tests by @ADBond in #1050
• Improving the cache and make cache invalidation easier and more robust by @RobinL in #987
• Bump version to 3.7.0 by @RobinL in #1056
• Release 3.7.0 as dev version by @RobinL in #1057

Full Changelog: v3.6.0...v3.7.0.dev01