Aiohttp-client-cache

- Lazily initialize and reuse SQLite connection objects
- Fix `AttributeError` when using a response cached with an older version of `attrs`
- Fix concurrent usage of `SQLiteCache.bulk_commit()`
- Add `fast_save` option for `SQLiteCache` (`PRAGMA` setting to improve write performance, with some tradeoffs)

- Remove upper version constraint for `attrs` dependency

- Fix `TypeError` bug when using `expire_after` param with `CachedSession._request()`

- Fix possible deadlock with `SQLiteCache.init_db()` and `clear()`

[See all issues & PRs for v0.7](https://github.com/requests-cache/aiohttp-client-cache/milestone/6?closed=1)

- Support manually saving a response to the cache with `CachedSession.cache.save_response()`
- Add compatibility with aioboto3 0.9+
- Migrate to redis-py 4.2+ (merged with aioredis)
- Add missing `aiosqlite` dependency for filesystem backend
- Add missing `CachedResponse` properties derived from headers:
- `charset`
- `content_length`
- `content_type`
- Add support for async filter functions
- Move repo to [requests-cache](https://github.com/requests-cache) organization

- Migrate to aioredis 2.0
- Fix issue with restoring empty session cookies