Merge pull request #3 from PDOK/bump-cbs-and-sqlite

Bump SQLite + Cloud-Backed SQLite to latest version

Merge pull request #2 from PDOK/add_cachsize_and_curl_logging_options

Allow user to configure cache size + cURL debug logging

Don't log to console from library

Merge pull request #1 from PDOK/duplicate-symbols

allow-multiple-definition isn't supported on macOS

Fixed rtree flag

Enable rtree for sqlite

Added go struct for vfs