- use UNLINK instead of DEL when available, use Redis 4.0+ for that
- request m2m objects for invalidation using correct db
- fixed caching counts, aggregates and exists in writes,
dirty transactions and while cacheops is disabled
- fixed various multidb/invalidation issues (Svan70)
- fixed db in .invalidated_update()
- fixed possible key disrepancy in cache_on_save with multidb
- fixed jinja2 support in Python 3
- documented CACHEOPS_CLIENT_CLASS