PyrateLimiter V3 release

[vutran1710]

Improvements & features

Phase I

• [x] Much improved performance (better algorithm, better rate observations, very fast on consuming data)
• [x] Better software design: much simpler, more extensible and easier to implement custom/extra logic without hacking around
• [x] Out-of-the-box workable with both async & sync methods
• [x] Decorator ready (both async & sync)
• [x] Delay processing
• [x] RedisAsyncBucket
• [x] Multithreaded test
• [x] Creating bucket at run time
• [x] Bucket leak background-task
• [x] Docs
• [x] Changelog
• [x] Release

Phase II

• [ ] Dynamic changing rate-limit for bucket during run time
• [ ] External rates store
• [ ] FileLock for SQLite
• [ ] Multi-process testing
• [ ] DynamoDB

Phase III

• [ ] Context
• [ ] Negative weight

Performance

Inserting 10k items to a single bucket, using different backends - running synchronouly with a for-loop

# InMemoryBucket
Performance test: insert 10k items 0.17364001274108887(secs)

# RedisBucket
Performance test: insert 10k items 5.8455188274383545(secs)

# SQLiteBucket
Performance test: insert 10k items 3.9313011169433594(secs)