GC support#138

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amsukdu wants to merge 3 commits intoyouknowone:mainfrom

amsukdu:feature-gc

Commits on Jun 16, 2019

GC support
amsukdu
committed

Commits on Jun 23, 2019

Removed threading & newly written test
amsukdu
committed

Commits on Jul 4, 2019

Fixed test_redis_hash fail. Changed RedisHashStorage, AioredisHashStorage __init__
amsukdu
committed