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