• Fix BLOB longer than INT_MAX bytes error for .gz archives larger than ~400GB.
• Add missing dataclasses dependency for Python 3.6.
• Open SQLite index read-only to allow multiple ratarmount instances to use it.
• Raise an exception if SQLiteIndexedTar cannot read the given file object.
• Warn on newer index versions.
• Add support for --index-name :memory: to create in-memory indexes.